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Demand Supply Pareto efficiency has nothing tosay about the distribution ofwelfare.

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  • (Demand and Supply) (Demand)

    3 1. (Price Demand)

    2. (Income Demand)

    3. (Cross Demand)

    Law of Demand

    2 (Income effect) (Real Income) (Substitution effect)

  • Economics for everyday life

    9

    1

    (P) (/)

    (Q) (/)

    25 20 15 10 5

    8 10 12 16 20

    (Individual Demand and Market Demand)

    (Individual Demand)

    (Market Demand)

    (/)

    (/)

    25 20 15 10 5

    8 10 12 16 20

    0 4 8 10 12

  • Economics for everyday life

    10

    (Determinants of Demand) 2 1. 2.

    1.

    2 1.1 (Substitution Goods) 1.2 (Complementary Goods)

    2. 2 2.1 (Normal Goods) 2.2 (Inferior Goods)

    3. 4. 5. 6. 7.

    (Demand Function)

    Qx = f (Px, Py, Y, A1, A2, ) Qx = f (Px)

  • Economics for everyday life

    11

    2 1. (Change in Quantity Demanded)

    2. (Shifts in the Demand

    Curve)

    (P) (/)

    (Q) (/)

    (Q)

    (/) (Q)

    (/) 25 20 15 10 5

    8 10 12 16 20

    5

    25

    20

    15

    10

    P (/)

    5 20 15 10 Q (/)

  • Economics for everyday life

    12

    5

    25

    20

    15

    10

    P (/)

    5 20 15 10 Q (/)

    5

    25

    20

    15

    10

    P (/)

    5 20 15 10 Q (/)

    25 30

  • Economics for everyday life

    13

    (Supply)

    Law of Supply

    1

    (P) (/)

    (Q) (/)

    25 20 15 10 5

    16 14 12 10 8

    (Individual Supply and Market Supply) (Individual Supply)

    (Market Supply)

    (/) (/)

    25 20 15 10 5

    16 14 12 10 8

    12 10 8 6 4

  • Economics for everyday life

    14

    (Determinants of Supply)

    2 1. 2.

    1. 2. 3. 4. 5. 6.

    (Supply Function)

    Qx = f (Px, B1, B2, )

    Qx = f (Px)

  • Economics for everyday life

    15

    2 1. (Change in Quantity Supplied)

    2. (Shifts in the Supply

    Curve)

  • Economics for everyday life

    16

    (Market Equilibrium)

    (/)

    () Qs - Qd Qd Qs

    25 20 15 10 5

    8 14 20 26 32

    28 24 20 16 12

    (Market Equilibrium)

    (/)

    () 5

    0 10 15 20 25 30

    20

    15

    5

    10

    35

    25

  • Economics for everyday life

    17

    1. 1.1

    1.2 2.

    2.1

    2.2

  • Economics for everyday life

    18

    3. 3.1 3.2 3.3 3.4

    2

    1. (Price Support or Minimum Price) 2. (Price Ceiling)

    1. (Price Support or Minimum Price)

    2

  • Economics for everyday life

    19

    1.1

    P

    1.2

    P

    Q

    Q

  • Economics for everyday life

    20

    2. (Price Ceiling)

    P

    (Elasticity of Demand and Supply)

    (Elasticity)

    (Elasticity of Demand) 3

    1. (Price Elasticity of Demand) 2. (Income Elasticity of Demand) 3. (Cross

    Price Elasticity of Demand)

    Q

  • Economics for everyday life

    21

    I (Price Elasticity of Demand)

    x

    xd

    d

    P%Q%E

    E

    20% 40%

    1. (Perfectly Inelastic Demand ; Ed = 0)

    2. (Inelastic Demand ; 0 < Ed < 1)

    3. (Unitary Elastic Demand ; Ed = 1)

  • Economics for everyday life

    22

    4. (Elastic Demand ; 1 < Ed < )

    5. (Perfectly Elastic Demand ; Ed = )

    Elastic Unitary Elastic Inelastic

    Ed > 1 Ed = 1 Ed < 1

    1.

    2.

    3.

    4.

  • Economics for everyday life

    23

    II (Income Elasticity of Demand)

    Y%Q%

    EY

    - (Normal Goods) - (Inferior Goods) 6,000 7,000 600 / 680 / 30% 10%

  • Economics for everyday life

    24

    III (Cross Price Elasticity of Demand)

    y

    xC P%

    Q%

    E

    - 2 (Substitution Goods)

    - 2 (Complementary Goods)

    10% 5% 90 60 / 70 80 /

  • Economics for everyday life

    25

    (Elasticity of Supply; Es) (Price Elasticity of Supply)

    x

    xs

    s

    P%Q%E

    E

    1,200 150 1,000 120

    1. (Perfectly Inelastic Supply ; Es = 0) 2. (Inelastic Supply ; 0 < Es < 1) 3. (Unitary Elastic Supply ; Es = 1) 4. (Elastic Supply ; 1 < Es < ) 5. (Perfectly Elastic Supply ; Es = )

  • Economics for everyday life

    26

    1.

    2.

    3.

    4.