電子商務研究智慧結構之演變-作者共引文分析的應用ijcs.topco-global.com/website/articles/2011vol3_no1_001_024.pdftechnology...
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商 略 學 報 2011 年,3 卷,1 期,001-024。
1
電子商務研究智慧結構之演變-作者共引文分析的應用
通訊作者李元墩為長榮大學經營管理研究所教授,地址 : 71101 台南市歸仁區大潭里長榮路一段 396 號,電話:+886-6-2785123 轉 2153,E-mail:[email protected]。作者余國訓為遠東科技大學行銷與流通管理系副教授,地址:74448台南市新市區中華路 49 號,電話 : +886-6-5979566 轉 5249,E-mail:[email protected]。作者李元德為長榮大學
經營管理研究所教授,地址:71101 台南市歸仁區大潭里長榮路一段 396 號,電話 :+886-6-2785123 轉 2036,E-mail:[email protected]。
本研究之目的為呈現內含在電子商務研究文獻智慧結構之演變。本研究以作者共引文分析與社會網絡分
析技術為研究方法;以 1996 年 至 2008 年發表在 SSCI 及 SCI 期刊有關電子商務議題的研究文獻為對象,共
計分析了 1,794 篇論文及其 37,101 筆參考文獻資料。研究結果顯示當代電子商務研究呈現五個主要研究趨勢:
電子商務之消費者行為、資訊科技與電子市集、電子商務推薦系統、電子資料交換實行及電子市場之自我服
務與顧客滿意度。儘管有大量研究出現在電子商務領域,相關研究之文獻卻未受到應有的重視;本研究提出
一個可以讓學術界及實務界更了解電子商務研究發展趨勢之方法;此方法可描繪出當代電子商務研究領域的
重要主題及闡明其研究領域的發展及變化。
關鍵詞:電子商務、智慧結構、知識網絡、作者共引文分析、社會網絡分析。
論文編號:IJCS2011004
收稿 2011 年 1 月 12 日→第一次修正 2011 年 2 月 18 日→第二次修正 2011 年 3 月 2 日→正式接受 2011 年 3 月 15 日
余國訓遠東科技大學
李元墩長榮大學
李元德長榮大學
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International Journal of Commerce and Strategy2011, Vol. 3, No. 1, 001-024
2
Evolution of the Intellectual Structure of Electronic Commerce Research: An Author Co-citation Analysis
The corresponding Author Yuan-Duen Lee, is a Professor in the Graduate School of Business and Operations Management, Chang Jung Christian University, Address: No.396, Sec. 1, Changrong Road, Gueiren District, Tainan City 71101, Taiwan, Tel: +886-6-278-5123 ext. 2153, E-mail: [email protected] Kuo-Hsun Yu, is an Associate Professor in the Department of Marketing and Logistics Management, Far East University, Address: No.49, Zhonghua Rd., Xinshi Dist., Tainan City 74448, Taiwan, Tel: +886-6-5979566 ext. 5249, E-mail:[email protected] Yender McLee, is a Professor in the Graduate School of Business and Operations Management, Chang Jung Christian University., Address: No.396, Sec. 1, Changrong Road, Gueiren District, Tainan City 71101, Taiwan, Tel: +886-6-278-5123 ext. 2036, E-mail: [email protected]
Kuo-Hsun YuFar East University
Yuan-Duen LeeChang Jung Christian University
Yender McLeeChang Jung Christian University
The purpose of this study is to explore and discuss the evolution of intellectual structure of electronic commerce research. Author co-citation analysis and social network analysis are used to trace the developmental path of electronic commerce research. The study analyzed 37,101 citations from 1,794 articles published in SSCI and SCI journals in the area of electronic commerce between 1996 and 2008, this study maps the knowledge network of electronic commerce studies. The results of this study suggest that contemporary electronic commerce research is organized along different concentrations of interest: consumer behaviors in electronic commerce, information technology and marketplaces, recommender systems in electronic commerce, implementation of electronic data interchange, e-satisfaction and self-service technology. The intellectual structure of electronic commerce literature has received little attention in spite of the fact that a significant number of studies have been done on electronic commerce. This study exposes researchers to a new way of profiling knowledge networks and their relationships the area of electronic commerce, thereby helping academia and practitioners better understand contemporary electronic commerce studies.
Key Words: Electronic Commerce, Intellectual Structure, Knowledge Network, Author Co-citation Analysis, Social Network Analysis.
Paper No.:IJCS2011004
Received January 12, 2011→First Revised February 18, 2011→Second Revised March 2, 2011→Accepted March 15, 2011
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2011 K.-H.Yu, Y.-D.Lee and Y. M. Lee 3
Introduction
Globalization and information technologies have
changed the faces of business and organizations. There is
a growing interest in the use of electronic commerce as a
mean to perform business transactions. With the interest,
concurrent has been a heavy emphasis in academic
research on the electronic commerce phenomenon.
Electronic commerce is generally defined as the use of
information and communication technologies for sharing
information, maintaining relationships, and conducting
transaction among consumers or with suppliers ,
customers, or competitors (Zwass, 1996; 2003). To
capture fully the multifaceted phenomena of electronic
commerce, it is necessary to support a variety of
theoretical concepts and research methods from different
academic disciplines.
To overcome these problems, many researchers have
attempted to review and reflect on the development of
electronic commerce (Ngai and Wat, 2002; Shaw et al.,
1997; Wareham et al., 2005), but a quantitative analysis
of articles published in the electronic commerce literature
is still lacking. Filling this gap, this study uses author
co-citation analysis and social network analysis to gain
an impression of electronic commerce research and its
evolution from 1996 to 2008.
The objective of the study is to explore the evolution of
the intellectual structure of electronic commerce research
by analyzing citations in the Social Science Citation Index
(SSCI) and the Science Citation Index (SCI) from 1996
to 2008. More specifically, the goals of this study are to
discuss changes in the discipline's subfields and identify
emerging topics in order to propose a comprehensive
methodology that can be used to investigate the literature
of one specific academic discipline.
The research methods used for this study are author
co-citation and social network analysis. Using citation
analysis, interlinked nodes are discovered from which the
most influential publications and scholars in the electronic
commerce field are identified. Further, author co-citation
analysis is conducted by utilizing the social network
analysis to identify the intellectual structure of electronic
commerce studies.
The paper is divided into four main sections. The
first one is a review of literature related to electronic
commerce, author co-citation and social network
analysis; the second section contains a description of
the methodology employed; the third section presents
and discusses the results of the empirical study; and the
fourth section presents a summary and discussion of the
conclusions drawn from this investigation, indicates its
limitations, and offers suggestions for future research.
Literature Review
Meta-research of Electronic Commerce
In the past decade, we have seen active research in
electronic commerce which produced an impressive array
of literature relating to the study of electronic commerce.
Some reviews about electronic commerce research were
completed in recent years (Ngai and Wat, 2002; Shaw et
al., 1997; Wareham et al., 2005). Shaw et al. (1997) laid
out the dimensions of electronic commerce and developed
a framework for identifying the important research
issues associated with electronic commerce. Taking an
interdisciplinary view that integrates technology and
business modeling, they proposed the scope of electronic
commerce, which includes five major topics: (1)
enterprise management; (2) global EC infrastructure; (3)
interface with consumers; (4) linking with distributors/
retailers; and (5) linking with suppliers. The contribution
of Shaw et al. (1997) was an exploration of five potential
electronic commerce research areas that combine business
modeling and technology development and to provide a
number of research opportunities in this area.
As the research on this topic advanced, Ngai and Wat
(2002) presented a literature review and classification
scheme for electronic commerce research. Based on the
literature review, the sample articles in their study were
classified into four broad categories: application areas,
technological issues, support and implication, and others.
Ngai and Wat (2002) showed that an increasing volume
of electronic commerce research has been conducted for
a diverse range of areas. They indicated that electronic
commerce research is difficult to confine to specific
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4 MarchInternational Journal of Commerce and Strategy
disciplines and suggested that the relevant material is
scattered across various journals. Recently, Wareham
et al. (2005) applied meta-analysis to profile available
electronic commerce research and also grouped the
sample articles into four major domains: information
technology and infrastructure, applications and industry
themes, business issues, and other issues.
At the same time, a few researchers have reviewed
certain subfields of electronic commerce. Kauffman
and Walden (2001) provided an overview of economic-
motivated electronic commerce studies from a variety
of disciplines and encouraged researchers in different
disciplines to collaborate and bring their expertise to bear
on issues in electronic commerce for which no single
perspective is sufficient. Recognizing the rapid increase in
the volume of research on electronic commerce customer-
relationship management, Romano and Fjermestad (2001)
found that electronic commerce customer-relationship
management researchers have applied a broad range of
methods to study a wide spectrum of subject matter.
It is worth noting that electronic marketplace literature
has attracted interest from many researchers in recent
years. These researchers have reviewed certain aspects
of electronic marketplaces, such as electronic market
design (Anandalingam et al., 2005) and corporate portals
(Dias, 2001). However, these reviews did not present a
full picture of the current electronic marketplace research
themes (Wang et al., 2008). In addition, studies also rate
researchers’ perceptions of journal quality and relative
prestige (Bharati and Tarasewich, 2002; Lee et al., 2007).
Another steam of meta-research is research commentaries
that discuss the major trends in academic discourse as
well as the most significant research questions (Straub
and Watson, 2001). Often, such commentaries have
argued that the phenomenon of interest is fundamentally
unique and requires great holistic or cross-disciplinary
focus (Geoffrion and Krishnan, 2003; Shaw et al., 1997).
In a related strain of research, we have found that
the interdisciplinary nature of electronic commerce
research attracts most agreement, but research directions
for electronic commerce are a controversial issue. To
overcome this problem, this study uses author co-citation
analysis and social network analysis to gain an impression
of electronic commerce research and its evolution from
1996 to 2008.
Author Co-citation Analysis
Author co-citation analysis (ACA) is a bibliometric
technique that uses a matrix of co-citation frequencies
between authors as its input (McCain, 1990) and that has
found widespread applicability. ACA, which uses seminal
authors in a discipline as the units of analysis, predicates
that the conceptual similarity in the works of such authors
will increase the likelihood of their being cited together
regularly (McCain, 1990). The frequency of co-citation
is therefore a measure of the proximity between authors
(White and Griffith, 1981).
General ly speaking, the formal and informal
communications that authors engage in are systematically
chronicled in journals that publish their works. Authors
working in a stream of research often cite one another's
publications as authors draw on common sources of
knowledge. Further, their works are likely to be frequently
co-cited by other authors working on intellectually
similar themes. The upshot of this process is an intricate
web of relationships between authors established through
the creation and dissemination of knowledge. Thus, co-
citations of seminal authors provide a basis for unraveling
the complex patterns of associations that exist among
them as well as trace the changes in intellectual currents
taking place over time.
ACA's unit of analysis is an individual author rather
than a specific paper or journal. It must be noted that
the name of an author is merely a label for the central
conceptual theme or idea that he or she represents
(Culman, 1986, 1987). This intellectual map is thus a
representation of ideational interactions among authors
established through the frequency of co-citation and the
overall distribution of co-citations that they share with
one another (McCain, 1990; White and McCain, 1998).
This makes ACA eminently suitable for explicating the
subfields that fall within the overall disciplinary domain
of electronic commerce. More specifically, ACA's ability
to reveal patterns of association between authors based
on their co-citation frequency makes it a prospective
methodology for understanding the evolution of an
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2011 K.-H.Yu, Y.-D.Lee and Y. M. Lee 5
academic discipline (White and McCain, 1998). The
versatility of the technique and its acceptance by diverse
disciplines make it appropriate for this study.
ACA has proven useful to describe, from an empirical
standpoint, the intellectual structure of one academic
discipline using an objective method. It has therefore been
applied in many academic areas such as management
(Acedo et al., 2001), marketing (Heisshmidt and Gorden,
1993), organizational behavior (Culnan et al., 1990),
conflict management (Ma et al., 2008), small enterprise
(Ratnatunga and Romano, 1997), management information
systems (White, 2003), strategic management (Acedo et
al., 2006; Nerur et al., 2008), international management
(Acedo and Casillas, 2005), knowledge management (Ma
and Yu, 2010), family business (Casillas and Acdeo, 2007),
RandD management (McMillan, 2008), and business
ethics (Ma, 2009). In these disciplines, this methodology
contributes to the identification of research gaps and to an
orientation toward future lines of study. This study also
aims to be a quick reference by which new researchers can
become familiar with electronic commerce as a field of
study.
Social Network Analysis
Network analysis was first used by sociologists to
explore the relationships between groups and individuals
(Scott, 1991). Over years, a series of tools and techniques,
which are useful in producing graphs representing
the relative distances between individuals, have been
developed. Further techniques have also been figured out
to explore structural patterns and the differing roles of
certain positions within the network. Network analysis is
becoming increasingly popular as a general methodology
for understanding complex patterns of interaction.
Advanced social network analysis (SNA) is the mapping
and measuring of relationships and flows between people,
groups, firms, animals, computers or other information/
knowledge processing entities. SNA is an analytical tool
that reveals the number of interactions and the closeness
of relationships between nodes within a network. In other
words, the nodes in the network are the people and groups
while the links show relationships or flows between the
nodes. SNA is a powerful diagnostic method used to
analyze the nature and pattern of relationships among
members of a particular domain. It is a collection of graph
analysis methods developed to analyze networks in social
science, computer networks, and communication studies,
among others. SNA provides mathematical definitions of
certain characteristics of the actors and the network itself:
the power of the actors, the range of influence, cohesion,
equivalence, and brokerage (Bonacich, 1987; Burt,
1992). These characteristics are expressed in terms of
corresponding network-structure parameters derived from
the relations among the actors.
According to Burt (1992), a social network is a group
of collaborating entities that are related to one another.
Mathematically, this is a graph wherein each participant in
the network is called an actor and depicted as a node in the
network. Actors can be persons, organizations, or groups,
or other sets of related entities. Relations between actors
are depicted as links between the corresponding nodes.
A co-citation matrix is inherently very similar to social
networks, a network of linked authors (Pilkington and
Teichert, 2006; Pilkington and Chai, 2008). There has been
an increased interest in the use of this method to analyze
the nature and pattern of informational relationships
among individual scholars or articles in one discipline
(Casey and McMillan, 2008; Ma et al., 2008; Pilkington
and Fitzgerald, 2006; Pilkington and Meredith, 2009). As
discussed above, this study proposes that SNA techniques
make it possible to study networks of knowledge such as
those characteristics of academic disciplines.
Methodology
Based on the objective of this study, we investigated
the evolution of the intellectual structure of electronic
commerce research between 1996 and 2008. Two reasons
justified selecting 1996 as the starting point. First, as
demonstrated by Ngai and Wat's (2002) study of nine
research journals, the number of articles on electronic
commerce has substantially increased since 1996.
Second, there were also only five articles collected by our
sampling method before 1996. Author co-citation analysis
and social network analysis are the main methods for
this study. Using citation and author co-citation (ACA),
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6 MarchInternational Journal of Commerce and Strategy
four stages were proposed for this study, and each stage
required different approaches to examine the evolution of
electronic commerce studies.
First, the databases as the sources of electronic
commerce publications were identified. Then, data
collection and analysis techniques were designed to
collect the desired information about the topics, authors,
and journals related to electronic commerce research.
For the data presented herein, the Social Science
Citation Index (SSCI) and Science Citation Index (SCI)
were used as the databases. The SSCI and SCI are
widely used databases and include citations published in
about 8,000 referred journals. This database is an index
of citations managed by the U.S. Institute for Scientific
Figure 1 Design of the Study
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2011 K.-H.Yu, Y.-D.Lee and Y. M. Lee 7
Information (ISI). Using SSCI and SCI provided the most
comprehensive and widely accepted databases related to
electronic commerce publications.
As discussed in the literature review, electronic
commerce discourse has been vigorous in many
managerial disciplines, including information systems,
marketing, finance, and logistics, among the more
obvious, so data used in this study were not drawn from
journals chosen by peer researchers (Acedo and Casillas,
2005; Pilkington and Meredith, 2009). Instead, the entire
databases of SSCI and SCI from 1996 to 2008 served
as the context for conducting the analysis. In order to
choose sample articles, this study used a “key words”
method which utilizes the SSCI and SCI databases key
word search from an article's title. Using “e-commerce”
and “electronic commerce” as key words, this study
included 1,794 journal articles which cited 37,101 other
publications as references. The cited publications in these
papers include both published books and other journal
articles.
In the second stage, citation analysis was tabulated
for each of the source documents using the bibliometric
analysis package Bibexcel from Persson (2003).
Moreover, since our aim was to explore the evolution of
intellectual structure in electronic commerce area, it was
necessary to divide the study period into two sub-periods
for which the first time period was from 1996 to 2002,
and the second period was from 2003 to 2008, bearing in
mind that our intention was not to identify real periods
but simply to register changes over the course of time.
Using the Bibexcel, key nodes that were the most cited
authors in knowledge networks in electronic commerce
studies were identified and the structures were developed.
The third stage was to perform an author co-citation
analysis (ACA) based on the most cited authors from each
sub-period in order to trace relationships between them
and identify schools of thought and prevailing topics of
research. ACA was also tabulated for each of the source
documents using the Bibexcel package. ACA is based on
the distribution frequencies obtained from the citations
count obtained by forming the pairs possible from the
60 most frequently cited authors and counting all the
articles that cited both authors (See Figure 2). Based on
the total number of citations in the selected articles, the
top scholars were identified, and then a co-citation matrix
was built before a pictorial map was drawn to describe
the correlations among different scholars (See Table 1).
In doing so, we followed the procedures recommended
by McCain (1990) that explored the intellectual structure
of information science research by applying factorial
analysis techniques in an author co-citation analysis.
Once the co-citation matrices were obtained, this study
used Pearson's correlation as a measure of similarity
between author pairs because it registers the likeness in
shape of their co-citation count profiles over all other
authors in the set (McCain, 1990; White and Griffith,
1981; White and McCain, 1998). In Figure 3, the co-
citation counts across a partial author set and the overall
correlation coefficients are illustrated for two pairs
of electronic commerce authors (data from Yu et al.,
2008). It can be seen that Jarvenpaa and Gefen have
a high positive correlation of 0.892. Each is co-cited
frequently or infrequently with the same authors. By
contrast, authors from two extremely different electronic
commerce schools of thought, Gefen and Bakos, have
marked different co-citation patterns and a correlation of
-0.129 across the entire set of authors.
In Figure 3, the correlation matrix serves as a matrix
of inter-authors of similarity, and the higher the positive
correlation, the more similar two authors are in the
perceptions of citers. There are two ways to treat the
main diagonal when calculating correlation coefficients.
The first of these involves taking the sum of the three
highest scores and dividing them by two (White and
Griffith, 1981); the other way (McCain, 1990) is simply
to consider it missing data and to apply the criterion of
omitting the two cases. For the sake of simplicity, this
study decided to ignore the scores on the main diagonal
when calculating the correlation coefficients for the pairs
of authors.
In the final stage, using UCINET 6.0, author co-
citation analysis was conducted by utilizing the social
network analysis and factor analysis. The results of author
co-citation analysis identify the intellectual structure of
electronic commerce studies and the knowledge nodes
that have contributed most to the studies on electronic
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8 MarchInternational Journal of Commerce and Strategy
Figure 2 Author Co-citation Count
Author 1 Author 2 Author 3 Author 4 Author 5
Author 1 1 1 3 1
Author 2 1 3 4 1
Author 3 1 3 18 10
Author 4 3 4 18 12
Author 5 1 1 10 12
Table 1 Author Co-citation Matrix (Extract)
commerce and their possible evolution patterns.
Results
The Findings from Citation Analysis
To identify the key scholars who have laid down the
ground work for electronic commerce, citation data were
tabulated for each of the 1,794 source documents using
the Bibexcel package. From a combination of journal
articles and books, the most cited scholar between 1996
and 2002 (the first seven years) was Kalakota, followed
by Bakos and Malone (See Table 2). For the second six
years, the statuses of important scholars have changed.
The most cited scholar was Gefen, followed by Davis and
Jarvenpaa (See Table 3).
These scholars have had an important influence on the
development of the electronic commerce area and thus
collectively define this field. It represents the focus of the
main authors in the field and this gives us an indication of
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2011 K.-H.Yu, Y.-D.Lee and Y. M. Lee 9
the popularity of certain electronic commerce topic.
The Intellectual Structure of Electronic Commerce Research: 1996-2002
In the next stage, data mapping was conducted, and
the intellectual structure of electronic commerce studies
was revealed using author co-citation analysis. Co-
citation analysis of authors involves recording the number
of papers that have cited a particular pair of authors.
The number of co-citations is interpreted as a measure
of similarity in the content of the two cited authors’
publications. By analyzing the references of published
articles, we can determine if any two references are
commonly referenced together, or “co-cited”. If a set
of such references tend to be frequently co-cited, then
this constitutes what we term a “structural knowledge
network” (Pilkington and Meredith, 2009). It is the set
of these networks, and the relationships between and
among them, that constitute the intellectual structure of a
field (Leydesdorff and Vaughan, 2006).
Co-citations were tabulated for each 1,794 source
documents using the Bibexcel package. Many of the
authors had very few co-citations that were either unlikely
to have had a significant impact the development of the
field and/or were too new to have had time to impact the
literature. To allow a focus purely on the critical themes,
Jarvenpaa Gefen Jarvenpaa Bakos
(r = +0.892*) (r = +0.013*)
Porter 7 2 7 25
Kalakota 8 5 8 12
Hoffman 22 15 22 8
Davis 15 15 15 12
Malone 8 3 8 37
Williamson 6 5 6 13
Maes 2 0 2 8
Zwass 5 2 5 13
Brynjolfsson 11 7 11 27
Shapiro 2 1 2 14
Partial Co-citation Count for Two Author Pairs
Bakos Jarvenpaa Porter Kalakota Hoffman Gefen
Bakos 1.000 0.013 0.863 0.631 -0.131 -0.129
Jarvenpaa 0.013 1.000 0.027 0.131 0.774 0.892
Porter 0.863 0.027 1.000 0.596 -0.009 -0.102
Kalakota 0.631 0.131 0.596 1.000 0.090 -0.047
Hoffman -0.131 0.774 -0.009 0.090 1.000 0.784
Gefen -0.129 0.892 -0.102 -0.047 0.784 1.000
Partial Co-citation Count for Two Author Pairs
Conversion to Correlation Matrix
Figure 3 Creation of Correlation Matrix
* Correlation over 32 Authors
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10 MarchInternational Journal of Commerce and Strategy
Rank Author Frequency Rank Author Frequency
1 Kalakota, R. 48 31 Grover, V. 8
2 Bakos, J. Y. 46 32 Iacovou, C. L. 8
3 Malone, T. W. 40 33 Ives, B. 8
4 Hoffman, D. L. 27 34 Milgrom, P. 8
5 Porter, M. E. 23 35 Tapscott, D. 8
6 Williamson, O. E. 23 36 Bhimani, A. 7
7 Maes, P. 21 37 Glushko, R. J. 7
8 Riggins, F. J. 20 38 Goolsbee, A. 7
9 Benjamin, R. 17 39 Mayer, R. C. 7
10 Shapiro, C. 17 40 Sarkar, M. B. 7
11 Zwass, V. 17 41 Teece, D. J. 7
12 Barua, A. 16 42 Anderson, R. E. 6
13 Clemons, E. K. 16 43 Ba, S. 6
14 Davis, F. D. 16 44 Brynjolfsson, E. 6
15 Rayport, J. F. 15 45 Cheng, E. 6
16 Mclure, C. E. 13 46 Choudhury, V. 6
17 Wigand, R. T. 12 47 Fox, W. F. 6
18 Alba, J. 11 48 Hellerstein, W. 6
19 Chavez, A. 11 49 Hsu, M. 6
20 Hagel, J. 11 50 Kauffman, R. J. 6
21 Timmers, P. 11 51 Lee, H. G. 6
22 Applegate, L. M. 10 52 Liang, T. P. 6
23 Bailey, J. P. 10 53 Liu, C. 6
24 Elsenhardt, K. M. 10 54 Okeefe, R. M. 6
25 Jarvenpaa, S. L. 10 55 Poon, S. 6
26 Strader, T. J. 10 56 Raiffa, H. 6
27 Delone, W. H. 9 57 Rogers, E. M. 6
28 Guttman, R. H. 9 58 Shaw M. J. 6
29 Turban, E. 9 59 Watson, R. T. 6
30 Bentler, P. M. 8
Table 2 Author Citation Frequency (frequency ≧ 6): 1996-2002
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2011 K.-H.Yu, Y.-D.Lee and Y. M. Lee 11
Rank Author Frequency Rank Author Frequency
1 Gefen, D. 83 31 Delone, W. H. 16
2 Davis, F. D. 53 32 Taylor, S. 16
3 Jarvenpaa, S. L. 50 33 Churchill, G. A. 15
4 Porter M. E. 47 34 Malone, T. W. 15
5 Bakos, J. Y. 40 35 Ngai, E. W. T. 15
6 Brynjolfsson, E. 40 36 Shapiro, C. 15
7 Hoffman, D. L. 40 37 Shardanand, U. 15
8 McKnight, D. H. 39 38 Turban, E. 15
9 Kalakota, R. 36 39 Amit, R. 14
10 Pavlou, P. A. 26 40 Guttman, R. H. 14
11 Venkatesh, V. 26 41 Sarwar, B. 14
12 Resnick, P. 25 42 Clemons, E. K. 13
13 Zwass, V. 24 43 Culnan, M. J. 13
14 Mayer, R. C. 23 44 Fishbein, M. 13
15 Maes, P. 22 45 Gulatir, R. 13
16 Rogers, E. M. 22 46 Liang, T. P. 13
17 Straub, D. W. 21 47 Schafer, J. B. 13
18 Zhu, K. 21 48 Szymanski, D. M. 13
19 Doney, P. M. 20 49 Fornell, C. 12
20 Hair, J. 20 50 Ganesan, S. 12
21 Ajzen, I. 19 51 Morgan, R. M. 12
22 Iacovou, C. L. 19 52 Pazzani, M. 12
23 Lohse, G. L. 19 53 Reichheld, F. F. 12
24 Parasuraman, A. 19 54 Timmers, P. 12
25 Chircu, A. M. 18 55 Bagozzi, R. P. 11
26 Poon, S. 18 56 Benjamin, R. 11
27 Tan, Y. H. 18 57 Bharadwaj, A. S. 11
28 Anderson, J. C. 17 58 Goolsbee, A. 11
29 Nunnally, J. C. 17 59 Grover, V. 11
30 Alba, J. 16 60 Premkumar, G. 11
Table 3 Author Citation Frequency (frequency ≧ 11): 2003-2008
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12 MarchInternational Journal of Commerce and Strategy
only authors with at least six citations in the first seven
years and eleven citations in the second six years were
carried forward to the analysis (See Tables 2 and 3).
This result in co-citation matrices included 59 authors
in the first seven years and 60 authors in the second six
years. To analyze the co-citation matrix of authors and
to identify the intellectual structure within the electronic
commerce field, social network analysis (SNA) was
adopted. SNA is an analytical tool that reveals the number
of interactions and, consequently, the closeness of the
relationships between nodes within a given network. It
produces diagrammatical representations of the relative
distances between nodes and illustrates structural patterns
and differing positions within the network (Wasserman
and Faust, 1997). An SNA of co-citation visualizes the
degree of relationship between core authors, which can
be used to represent research themes. The graphing
programmer NETDRAW (Version 1.0 which comes with
the social network software suite UCINET6.0, Borgatti
et al., 2002) was used to examine the co-citation matrices
for authors. Figure 4 shows the core of the co-citation
of authors in this sample of articles with links of greater
than or equal to three co-citations in order to keep the
diagrams relatively uncluttered and easier to interpret.
The number of each node presents the rank of citations
received by the chosen authors from our sample articles
as detailed in Table 2.
The diagram in Figures 4 is very telling and provides
a clear picture. It focuses only on the very core area and
a limited amount of the data available. Taking the co-
citation matrices and grouping the authors using a factor
analysis of the correlation between the entries determines
which authors are grouped together and there share a
common element. The co-citation correlation matrices
were factor analyzed using varimax rotation, a commonly
used procedure, which attempts to fit (or load) the
maximum number of authors on the minimum number of
factors. The diagonals were considered missing data and
apply the criterion of omitting the two cases (pairwise
delete) (McCain, 1990).
Six factors were extracted from the data and together
they explain over 70.7% of the variance in the correlation
matrix. Table 4 lists the six most important factors along
with the authors that had a factor loading of at least
0.7. The authors were tentatively assigned names to
the factors on the basis of our own interpretation of the
publications of the authors with high associated loadings.
Implicitly, our interpretation of the analysis results was
that the electronic commerce field comprises six basic but
different sub-fields: information technology and strategy,
essential and structure of electronic commerce, taxes in
electronic commerce, agent-based electronic commerce,
intermediaries in electronic markets, and diffusion of
electronic commerce. We made no attempt to interpret
the remaining factors on account of their relative small
eigenvalues (less than 1). They likewise have been
excluded from Table 4.
Figure 4 and Table 4 clearly indicate that the most
influential scholars in electronic commerce studies
between 1996 and 2002 clustered together. The main
research focused on information technology and strategy.
Porter's (1980) business-level generic strategy related to
cost, differentiation, and focus have attracted attention
from electronic commerce researchers. He submitted
the Five Forces Model of competitive strategy and
proposed that competitive priorities composed of cost,
quality, delivery, flexibility, and innovation. Porter’s
notion was crucial to electronic commerce research.
Later, Porter (2001) applied the Five Forces Model to
B2B e-marketplaces. According to Porter (2001), the
most important determinant of a marketplace’s profit
potential is the intrinsic power of the buyers and suppliers
in the product area (Porter, 2001). While the strategic
implications of the Internet have been addressed (Porter,
2001; Shapiro and Varian, 1999), the nature of products
and services has not received the same treatment. Shapiro
and Varian (1999) submitted the Open Innovation Model
which is characterized by the exploitation of intellectual
property in order to create value. Using improved
computing technologies and digital networks, knowledge-
based activities can be performed in cooperation with
other components in social systems in almost an infinite
number of ways when and how they are needed. From
an asset perspective, Brynjolfsson (1994) extended the
property-rights framework (Hart and Moore, 1990) by
including productive knowledge and information as
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2011 K.-H.Yu, Y.-D.Lee and Y. M. Lee 13
Figure 4 Intellectual Structure of Electronic Commerce Research (1996-2002)
Factor 1: information technology and strategy
30.7% variance Factor 2: essentials and structure of electronic commerce
12.1% variance Factor 3: taxes in electronic commerce
8.6% variance
Lee, H.G. 0.882 Liu, C. 0.890 Fox, W.F. 0.962
Brynjolfsson, E. 0.863 Ives, B. 0.825 Hellerstein, W. 0.962
Clemons, E.K. 0.842 Zwass, V. 0.821 McLure, C.E. 0.961
Kauffman, R.J. 0.831 Applegate, L.M. 0.812 Goolsbee, A. 0.930
Teece, D.J. 0.791 Strader, T.J. 0.802
Porter, M.E. 0.785 Delone, W.H. 0.799
Shapiro, C. 0.754 Jarvenpaa, S.L. 0.785
Grover, V. 0.738 Kalakota, R. 0.784
Bakos, J.Y. 0.704 Riggins, F.J. 0.749
Hoffman, D. 0.735
Wigand RT 0.710
Benjamin R 0.701
Factor 4: agent-based electronic commerce
7.8% varianceFactor 5: intermediaries in electronic markets
7.0% varianceFactor 6: diffusion of electronic commerce
4.5% variance
Glushko, R.J. 0.958 Sarkar, M.B. 0.728 Watson, R.T. 0.765
Chavez, A. 0.903 Ba, S. 0.700 Rogers, E.M. 0.758
Guttman, R.H. 0.725
Maes, P. 0.717
Table 4 Author Factor Loadings at 0.7 or Higher: 1996-2002
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14 MarchInternational Journal of Commerce and Strategy
intangible assets that affect agents’ marginal products
when they have access to them.
Meanwhile, Clemons et al. (1993) emphasized that
information technology (IT) systems have the capability
to lower external coordination costs without increasing
the contractual risks associated with market transactions
and proposed that an IT system reduces transaction
risks such as the contractual hazards of shirking and
opportunism through improved monitoring and reduced
specificity in coordination. Furthermore, the potential
of the Internet and its associated technologies to enable
global electronic commerce has been widely documented
(Lee and Clark, 1997).
Based on Figure 4 and Table 4, the essentials and
structure of electronic commerce permeate the authors
in the second group. Zwass (1996) defined electronic
commerce as“ ……the sharing of business information,
maintaining business relationships, and conducting
business transaction by means of telecommunications
networks.” He pointed out that electronic commerce
includes not only buying and selling goods, but also
various processes within individual organizations that
support that goal. Similarly, Applegate et al. (1996)
also viewed electronic commerce as more than simply
buying and selling goods electronically. They pointed
out that electronic commerce involves using network
communications technology to engage in a wide range
of activities up and down the value-added chain both
within and outside the organization. In addition, Kalakota
and Whinston (1996) stated that four different types
of information technology are converging to create the
merging of this discipline as mostly customer-to-business
applications. Meanwhile, some research has studied
how to approach customers through home pages and to
measure user information satisfaction (Ives et al., 1983;
Liu et al., 1997).
The topic of taxes in electronic commerce permeates
the authors in the third group. There are some tax studies
on the Internet in the literature. Some of them provide
either conceptual or legal analysis for taxation of the
Internet (e.g. Fox and Murray, 1997; Hellerstein, 1997a,
1997b; McLure, 1997) or individual level analysis for the
impact of taxation on online purchases (e.g. Goolabee,
2000). Fox and Murray (1997) concluded that the sales
tax should be designed to be largely consistent with
the current electronic commerce structure. Advanced,
Goolsbee (2000) suggested that people living in high
sales taxes locations are significantly more likely to buy
online.
Agent-based electronic commerce permeates the
authors in the fourth group. Software agents help
automate a variety of tasks including those involved in
buying and selling products over the Internet. Guttman
et al. (1998) surveyed several of these agent-mediated
electronic systems by describing their roles in the context
of a Customer Buying Behavior (CBB) model and
proposed that traditional marketing models with concepts
from software agents research accommodate electronic
markets. Interaction among agents, an important aspect
on research of a multi-agent system, is set up on lower-
level data communication as well as control information
containing semantics and knowledge. Meanwhile, there
is some research focusing on the use of XML (Extensible
Markup Language) in agent communication (Glushko et
al., 1999).
In related research, Maes et al. (1999) proposed
that consumers experience two steps of alternative
evaluation before they make a purchase decision: product
brokering and merchant brokering. Product brokering
involves evaluation of product alternatives, and merchant
brokering is to determine who to buy from. Their research
on automated negotiation, which was initiated to satisfy
people's need for convenience, sought to solve problems
by using automated agent systems which conduct
negotiation tasks on behalf of people.
Intermediaries in electronic markets permeate the
authors in the fifth group. Research has generally focused
on the benefits of electronic markets from a transaction
cost economic perspective. For example, economic-based
research has examined the role of intermediaries (Sarkar
et al., 1995). Sarkar et al. (1995) have referred to how
intermediaries in electronic markets serve a variety of
roles and function from search and directory services, to
aggregation, to authentication and assurance. A variety of
electronic intermediary services available on the Internet
enables consumers to navigate extensive databases on
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2011 K.-H.Yu, Y.-D.Lee and Y. M. Lee 15
Figure 5 Intellectual Structure of Electronic Commerce Research (2003-2008)
websites and to locate their most preferred vendors,
thus significantly reducing search costs pertaining to
individual consumers or buying firms (Sarkar et al.,
1996). Consumers may be motivated by the ability to
implicitly derive a certain set of utilities by patronizing a
given type of shopping setting (Sarkar et al., 1996).
Diffusion of electronic commerce permeates the
authors in the last group. In examining the diffusion
of electronic commerce, Rogers's (1995) work on the
attributes of innovations that influence diffusion is well
known and has formed the basis of electronic commerce
research. The diffusion of innovations model describes
the “process by which an innovation is disseminated
over time among members of a social system” and
suggests that the impact of innovations will be maximized
when researchers and clinic staff work collaboratively
to redesign core processes around innovation and
allocate resources to creative incentives and monitor its
use (Rogers, 1995). Additionally, electronic commerce
researchers have come to realize that the acceptance of a
system is significantly dependent on the ease with which
people can operate it (Davis, 1989).
Watson et al. (1998) additionally proposed that there
are several reasons for companies to create their own
websites, including reducing the costs of matching buyers
and sellers, promoting company’ image, increasing
visibility, improving customer service, enabling market
expansion, and lowering stakeholder communication
costs. They also concluded that the Internet provides a
global infrastructure that enables compression of time and
space, integrated supply chains, mass customization and
navigational ability.
The Intellectual Structure of Electronic Commerce Research: 2003-2008
Similarly, using UCINET 6.0, Figure 5 shows the core
of the co-citation of authors in this sample of articles with
links of greater than or equal to three co-citations in order
to keep the diagrams relatively uncluttered and easier to
interpret. The number of each node presents the rank of
citations received by the chosen authors from the sample
articles as detailed in Table 3.
In the same way, five factors were extracted from
the data and together they explain over 74.2 % of the
variance in the correlation matrix of the second six years.
Table 5 lists the five most important factors along with the
authors that had a factor loading of at least 0.7. We also
tentatively assigned names to the factors on the basis of
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16 MarchInternational Journal of Commerce and Strategy
our own interpretation of the publications of authors with
high associated loadings. Implicitly, our interpretation
of the analysis results was that the electronic commerce
field comprises five basic but different sub-fields:
consumer behavior in electronic commerce, information
technology and electronic marketplaces, recommender
systems in electronic commerce, implementation of
electronic data interchange, and e-satisfaction and self-
service technology. We also made no attempt to interpret
the remaining factors on account of their relative small
eigenvalues (<1). They have similarly been excluded
from Table 5.
Figure 5 and Table 5 also clearly indicate that the
most influential scholars in electronic commerce studies
between 2003 and 2008 clustered together. The main
research focused on consumer behavior in electronic
commerce. In examining consumer behavior in electronic
commerce, first, Davis (1989) proposed the technology
acceptance model (TAM) which is based on the theory
of reasoned action has two major constructs: perceived
usefulness and perceived ease of use. Further, Jarvenpaa
and Todd (1996) suggested that the most important
perceived benefit of Internet shopping is convenience,
while they indicated that poor customer service, poorly
designed websites, and perceived risk were cited by
online shoppers as negative factors and observed that the
Factor 1: consumer behavior in electronic commerce
34.7% variance Factor 2: information technology and electronic marketplaces
21.2% variance Factor 3: recommender systems in electronic commerce
8.2% variance
Doney, P.M. 0.967 Chircu, A.M. 0.920 Pazzani, M. 0.941
Mayer, R.C. 0.966 Clemons, E.K. 0.913 Schafer, J.B. 0.926
Tan, Y.H. 0.964 Bakos, J.Y. 0.871 Sarwar, B. 0.922
McKnight, D.H. 0.960 Malone, T.W. 0.853 Shardanand, U. 0.922
Pavlou, P.A. 0.952 Zhu, K. 0.849 Resnick, P. 0.912
Gefen, D. 0.945 Grover, V. 0.843 Guttman, R.H. 0.723
Ganesan, S. 0.928 Brynjolfsson, E. 0.833
Culnan, M.J. 0.923 Shapiro, C. 0.825
Jarvenpaa, S.L. 0.907 Bharadwaj, A.S. 0.810
Venkatesh, V. 0.851 Benjamin, R. 0.742
Davis, F.D. 0.821
Ajzen, I. 0.811
Taylor, S. 0.809
Bagozzi, R.P. 0.760
Hoffman, D.L. 0.757
Fishbein, M. 0.735
Reichheld, F.F. 0.711
Factor 4: implementation of electronic data interchange
6.1% variance
Factor 5: e-satisfaction and self-service technology
3.4% variance
Premkumar, G. 0.793 Szymanski, D.M. 0.800
Rogers, E.M. 0.733 Parasuraman, A. 0.763
Poon, S. 0.723
Table 5 Author Factor Loadings at 0.7 or Higher: 2003-2008
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2011 K.-H.Yu, Y.-D.Lee and Y. M. Lee 17
most influential factors that lure customers to the Internet
is discount price; therefore, creative pricing is the core
business model of many Internet companies.
Trust is vital to consumer behavior related to electronic
commerce. According to Mayer et al. (1995), trust and
risk perception are very strongly interrelated. They
regarded risk as an essential component of trust; one
must take a risk in order to engage in a trusting action.
Research in other arenas suggested that trust develops, at
least in part, as a function of successful/satisfying prior
experience with an individual or group (e.g. Doney and
Cannon, 1997; Ganesan, 1994).
Many researchers have focused on the topic of trust in
electronic commerce (Gefen, 2000; Gefen et al., 2003;
Pavlou, 2003; Tan and Theon, 2000). Tan and Theon
(2000) presented a generic model of trust for electronic
commerce consisting of two basic components, party
trust and control trust, based on the concept that trust in a
transaction with another party combines trust in the other
party and trust in the control mechanisms that ensure the
successful performance of the transaction.
In a re la ted s t ra in of research, Gefen (2000)
empirically revealed that individual's general trusting
propensity, which is the product of a lifelong socialization
process, is positively related to individual trust. Further,
Gefen et al., (2003) proposed a variable“trust”for
studying electronic commerce acceptance. Extending the
trust factor into the Technology Acceptance Model (TAM)
enables a better explanation of electronic commerce usage
behavior. The importance of trust in electronic commerce
can hardly be overestimated. McKnight and Chervany
(2001) distinguished trusting beliefs from trusting
intentions in the concept of trust toward Web vendors. In
electronic commerce, trusting beliefs include competence,
benevolence, integrity, and predictability exhibited by
Web vendors when they interact with consumers. Also,
trusting intentions include the consumer's willingness to
depend on and the subjective profitability of depending
on the Web vendors when making a transaction (McKnight
and Chervany, 2001).
Based on Figure 5 and Table 5, information technology
and electronic marketplaces permeate the authors in the
second group. Electronic marketplaces are defined as a
virtual gathering of buyers and sellers in an electronic
environment that coordinates transactions between
different individuals and firms (Malone et al., 1987). Early
work by Malone et al. (1987) argued for efficiency gains
in electronic marketplaces. It was expected that electronic
communication would rapidly reduce transaction costs in
electronic marketplaces and make them disintermediated
and frictionless (Chiru and Kauffman, 2000).
In a related strain of research, Bakos (1991) presented
a more circumscribed view of the electronic marketplace
as a facilitator of information about prices and products
and argued that the electronic marketplace reduce the
costs incurred to acquire information. Further, Bakos
(1997) concluded that lowering buyer's search costs
enables buyers to find low-cost sellers and that the
electronic marketplace will therefore promote price
competition among sellers.
Recommender systems in electronic commerce
permeate the authors in the third group. In examining the
recommender systems, Schafer et al., (2001) proposed
that recommender systems are an effective way to
achieve mass customization in electronic commerce.
Recommender systems enrich online store sales and are
an effective way to increase customer satisfaction and
consequently, customer loyalty. Recommender systems
also improve cross-selling by suggesting additional
products for the customer to purchase and help customers
identify products according to their interests. This calls
for personalized product recommendations.
In particular, for the field of recommender systems,
the Bayesian classifier, decision trees or instance based
classifiers have been commonly employed for improving
user models designed for the task of filtering useful items.
For instance, Bayesian classifiers and decision trees can
be found in significative recommender systems (Pazzani
and Billsus, 1997). Instance based classifiers are common
in collaborative filtering (CF) approaches (Resink et
al., 1994). One of the most successful recommendation
techniques to date is the CF method (Sarwar et al., 2000;
Shardanand and Maes, 1995), whose performance has
been proved in various electronic commerce applications
(Sarwar et al., 2000). The CF method automates the
“word of mouth” that we usually receive from our
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18 MarchInternational Journal of Commerce and Strategy
family, friends, and co-workers (Shardanand and Maes,
1995). Therefore, CF-based recommender systems should
form a group of recommenders that plays the information
source for a target customer.
Implementation of electronic data interchange (EDI)
permeates the authors in the fourth group. Based on
an innovation diffusion perspective, Premkumar et al.
(1994) studied the demand uncertainty of a product and
developed a model to describe the tangible benefits of an
EDI project based on the theory of Brownian motion and
found that the size of the initial investment is a significant
barrier to EDI adoption.
The l i te ra ture has revealed tha t many of the
determinants associated with successful implementation
projects and organizational change, including top
management support, presence of a champion, and
adequate resource support, communication, and training,
are significantly associated with successful EDI adoption
and implementation (Premkumar and Ramamurthy, 1995).
Many of these factors have appeared in the technology
management l i terature and include the technical
compatibility of systems, availability of technical and
professional staff, managerial competencies, the size
of organizations, financial support, proactiveness, and
organizational readiness for EDI adoption (Iacovou et al.,
1995; Premkumar and Ramamurthy, 1995).
E-satisfaction and self-service technology permeate the
authors in the last group. Consumers’ perception about
Internet retailers is mainly built upon their interactions
with the websites. The gap between customer perception
and e-business website representations is the majority
cause of electronic commerce shortages. As researchers
(Szymanski and Hise, 2000) have suggested, information
quality is a strong determinant of consumer satisfaction
with Internet shopping. Szymanski and Hise (2000) also
found product information and site design to be critical in
creating a satisfying customer experience.
Further, in examining self-service technologies,
Parasuraman and Grewal (2000) proposed that companies
are drawn to self-service technologies by their promise
of greater cost efficiencies, enhanced service quality,
and attraction of new customers resulting from in-
person services. On the other hand, software engineers
must understand customer needs to better design
technology solutions. In short, modern service designs
require multidisciplinary approaches, methods, and tools
(Parasuraman and Zinkhan, 2002).
Evolution of the Intellectual Structure of Electronic Commerce Research
Table 6 points to a decline in the significance of
electronic commerce strategy and is accompanied by a
simultaneous change in treatment. Instead of exploring
particular information technology and marketing methods
associated with the best practice and the effective pursuit
of strategic objectives, firstly, there is a need to examine
strategy more generally and, secondly, there is a need
to integrate other specific information technology and
marketing practices with electronic commerce strategy.
By comparing the details shown in Tables 4 and 5,
we can see that discussions in the earlier data set on the
need for information technology to be at the heart of
electronic commerce are missing in the later set. The
later set has replaced these discussions with interests in
the link between information technology and marketing.
This gives greater prominence to the context of consumer
Electronic commerce sub-fields, 1996-2002 Electronic commerce sub-fields, 2003-2008
1. information technology and strategy 1. consumer behavior in electronic commerce
2. essentials and structure of electronic commerce 2. information technology and electronic marketplaces
3. taxes in electronic commerce 3. recommender systems in electronic commerce
4. agent-based electronic commerce 4. implementation of electronic data interchange
5. intermediaries in electronic markets 5. e-satisfaction and self-service technology
6. diffusion of electronic commerce
Table 6 Electronic Commerce Sub-fields
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2011 K.-H.Yu, Y.-D.Lee and Y. M. Lee 19
behavior, electronic marketplaces, and electronic
shopping.
In addition, it is easy to see from the comparison
that the key nodes in research focused on the current
electronic commerce knowledge network, as shown in
Figure 5, are more concentrated than their counterparts
in Figure 4, and closer links have been seen built among
scholars who are doing research on electronic commerce.
The density of the correlations between different scholars
has greatly increased. With more scholars and more
resource added to electronic commerce studies, a better
academic environment conducive for cross-fertilization
of research ideas in the electronic commerce field is
formed, and electronic commerce research will gain more
momentum for further development.
Conclusions
Summary and Conclusions
The intellectual structure of electronic commerce
literature has received little attention in spite of the
fact that a large number of studies have been done
on electronic commerce. To identify the intellectual
structure of electronic commerce studies, this study
exposes researchers to a new way of profiling key
themes, concepts and their relationships in the area of
electronic commerce, which will help academia and
practitioners better understand electronic commerce
studies. Using author co-citation and social network
analysis to analyze the citation and co-citation data
published in SSCI and SCI databases between 1996
and 2008, this study investigates electronic commerce
research and describes the intellectual structure of the
area of electronic commerce. The results of this study
suggest that contemporary electronic commerce research
is organized along different concentration of interests:
consumer behavior in electronic commerce, information
technology and electronic marketplaces, recommender
systems in electronic commerce, implementation of
electronic data interchange, and e-satisfaction and self-
service technology.
In addition, as shown in Figure 5, closer ties and
more associations among electronic commerce research
have been established in recent years. The inter-linkage
between different key authors will attract more resources
that help to strengthen the critical research themes in
electronic commerce when newly attracted scholars start
to use them to build even stronger theory and theoretical
framework, which in turn helps the electronic commerce
field to deal with more complex issues and concerns. The
consequence of more thinkers and scholars perusing their
interests advances the state of previous research ideas. In
turn, this process helps to further the depth and breadth
of the field, which is bound to attract even more scholars
and practitioners to continuously enrich theoretical cores
and may simultaneously lead to a stronger conceptual
framework or theoretical paradigm. As a result, the
intellectual structure of the electronic commerce field is
expanded, and its knowledge network's foundations are
consolidated. With this increasing dynamism and the
emergence of a continuously consolidating paradigm to
lead both the academic inquiry and industrial practice,
and through such an evolving process, electronic
commerce research is growing, and its knowledge
network is developing.
The contribution of this study is to provide a
favorable research direction in the area of electronic
commerce and propose a comprehensive methodology of
identifying the relative importance of different authors
in the development of the electronic commerce field.
The results of this study complement and improve the
findings of other studies that have approached the subject
from the qualitative perspective. More specifically,
the methodology of this study provides a quantitative
analysis of the state of the art as a complement to, but
never a substitute for, traditional qualitative methods
of reviewing the literature. It can be used as a tool to
identify the authors, articles, and journals most widely
read among the researchers in a given field and also to
detect relational links between them.
Limitations and Future Research
As discussed at the beginning of this study, there is a
need to be cautious and a need to understand that citation
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20 MarchInternational Journal of Commerce and Strategy
data as a measure of scientific performance is not without
limitations. First, the sample articles were chosen from
1996 to 2008, which might affect the generalization of
this study. Choosing the time period is a topic of debate.
Different researchers can always argue for a different
time period for this line of research. Future research may
use the data from other periods of interest. Similarly, this
study divided the analysis into two periods, bearing in
mind that our intention was not to identify real periods
but simply to register changes over the course of time,
which cannot handle the changes of the dot.com market
collapse of 2000.
Second, it is difficult to avoid some degree of
subjectivity in deciding the number of authors to be
included in an analysis. At the same time, the choice of
authors is critical in determining the configuration of the
field (McCain, 1990), and hence it is important to be as
objective as possible. The researcher invariably has to
make some judgment calls balancing these contrasting
considerations. This study believed that the 60 authors
identified through objective criteria in our study are fairly
representative of the field. In the event that an important
author has been omitted, it would be fair to assume
that his or her core concepts would be embodied in the
publications of the authors included in this study.
Third, the identification of the authors included in
this study was based on the most cited lead authors. This
may understate the contributions of co-authors who are
influential scholars in the field, but who did not figure in
our list because they were not lead authors. Fourth, our
search criteria may be incomplete, and many good papers
that may not have been included.
Some of the limitations mentioned above have no
solution; these, however, are not exclusive to author
co-citation analysis but are rather present in any non-
experimental discipline and in management in particular.
Other, however, can be addressed and should provide an
incentive toward the methodology used in this study. In
this respect, future research is encouraged to combine
author co-citation analysis with content analysis. Content
analysis is a research tool used to determine the presence
of certain words or concepts within texts or sets of texts.
Researchers quantify and analyze the presence, meanings,
and relationships of such words and concepts, then make
inferences about the messages within the texts. With
content analysis, the time lag, often associated with
citation analysis, ceases to be a problem since the current
texts can always be used for analysis (while author co-
citation analysis requires the current texts be cited before
they can be useful data points) to determine whether the
studied texts are electronic commerce related or not and
further to determine their importance and potential impact
on the field of electronic commerce.
This study demonstrates the use of author co-citation
methodology, which has great potential for use in
management research. This type of analysis is possible in
a wide range of topics, especially newly developed areas
such as consumer behavior in electronic commerce and
electronic marketplaces, where bibliometric studies have
not yet been conducted. Additionally, this methodology
can be applied to other forms of scientific and technical
writing, such as congress proceedings, doctoral theses
and patents.
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22 MarchInternational Journal of Commerce and Strategy
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24 MarchInternational Journal of Commerce and Strategy
余國訓為遠東科技大學行銷與流通管理系副教授,長榮大學經營管理博士。主要研究領域為電子商務、組織行
為。學術論文曾發表於電子商務學報 (TSSCI)、International Journal of Conflict Management(SSCI), Journal of Knowledge Management(SSCI) 等期刊。
Kuo-Hsun Yu is an Associate Professor at the Graduate School Marketing and Logistics Management, Far East University. He received his doctoral degree in Business and Operations Management from Chang Jung Christian University, Taiwan. His research areas include Electronic Commerce and Organizational Behavior. His research papers have been published at Journal of E-Business (TSSCI), International Journal of Conflict Management (SSCI), and Journal of Knowledge Management (SSCI) and others.
李元墩為長榮大學經營管理研究所教授,美國愛荷華州 Drake University 教育管理與人力資源博士。主要研究領
域為國際人力資源管理、組織行為與管理、領導學、知識管理。學術論文曾發表於中山管理評論 (TSSCI),科技管
理學刊,Asia Pacific Management Review (TSSCI), Journal of Chinese Institute of Industrial Engineers (TSSCI), Journal of E-Business (TSSCI), Group Decision and Negotiation (SSCI), International Journal of Human Resource Management (SSCI), European Journal of Operational Research (SCI) 等期刊。
Yuan-Duen Lee is a Professor at the Graduate School of Business and Operations Management, Chang Jung Christian University. He received his doctoral degree in Educational Management and Human Resource from Drake University, USA. His research areas include IHRM, OB and Management, Leadership, and Knowledge Management. His research papers have been published at Sun Yat-Sen Management Review (TSSCI), Journal of Technology Management, Asia Pacific Management Review (TSSCI), Journal of Chinese Institute of Industrial Engineers (TSSCI), Journal of E-Business (TSSCI), Group Decision and Negotiation (SSCI), International Journal of Human Resource Management (SSCI), and European Journal of Operational Research (SCI) and others.
李元德為長榮大學經營管理所教授,加拿大 McGill University 管理哲學博士。主要研究領域為科學計量學為知識
網路泛研究方法論、科技創新創業策略管理、資訊科學與管理、國際企業管理。學術論文曾發表於 Small Business Economics(SSCI), International Journal of Technology Management(SSCI), International Journal of Conflict Management, (SSCI) and Technovation(SSCI).
Yender McLee is a Professor at the Graduate School of Business and Operations Management, Chang Jung Christian University. He received his doctoral degree in Management from McGill University, Canada. His research areas include TIM, MIS, Strategic and Particularly Meta-methodology via Paradigm-mining. His reach paper has been published at international journal articles, including recently in Small Business Economics (SSCI), International Journal of Technology Management (SSCI), International Journal of Conflict Management (SSCI), and Technovation (SSCI).