同济大学：《经济学》课程教学资源（教案讲义）Ch06-2 Imperfect Competition

08-16 0 Monopoly ·The Multiplant Firm -Choosing total output and the output for each plant: The marginal cost in each plant should be equal. The marginal cost should equal the marginal revenue for each plant. Economics ECONOMICS MANAGEMENT SCHOOL,TONGJI UNIVERSITY

Economics ECONOMICS & MANAGEMENT SCHOOL, TONGJI UNIVERSITY 08-16 Monopoly • The Multiplant Firm – Choosing total output and the output for each plant: • The marginal cost in each plant should be equal. • The marginal cost should equal the marginal revenue for each plant

190 08-17 ④ Monopoly The Multiplant Firm 。 Algebraically: &COutput Cost for Plant 1 2 &C2Output Cost for Plant 2 Total Output =Or=+2 Economics ECONOMICS MANAGEMENT SCHOOL,TONGJI UNIVERSITY

Economics ECONOMICS & MANAGEMENT SCHOOL, TONGJI UNIVERSITY 08-17 Monopoly • Algebraically: 1 2 2 2 1 1 Total Output & Output & Cost for Plant 2 & Output & Cost for Plant 1 Q Q Q Q C Q C  T     The Multiplant Firm The Multiplant Firm

08-18 Monopoly The Multiplant Firm ·Algebraically: π=PQ-C(Q)-C2(Q2) △π A(P9)_△C=0 △Q Δg Δ9 Economics ECONOMICS MANAGEMENT SCHOOL,TONGJI UNIVERSITY

Economics ECONOMICS & MANAGEMENT SCHOOL, TONGJI UNIVERSITY 08-18 Monopoly • Algebraically: 0 ( ) ( ) ( ) 1 1 1 1 1 1 2 2             Q C Q PQ Q PQ C Q C Q T T   The Multiplant Firm The Multiplant Firm

907 08-19 Monopoly The Multiplant Firm 。Algebraically: (MR A(PO）-(MC)AC=0 △Q, △O MR=MC Economics ECONOMICS MANAGEMENT SCHOOL,TONGJI UNIVERSITY

Economics ECONOMICS & MANAGEMENT SCHOOL, TONGJI UNIVERSITY 08-19 Monopoly • Algebraically: 1 1 1 1 ( ) 0 ( ) ( ) MR MC Q C MC Q PQ MR T        The Multiplant Firm The Multiplant Firm

08-20 0 ④ Monopoly ·Algebraically: MR MC MR MC2 MR MC=MC, Economics ECONOMICS MANAGEMENT SCHOOL,TONGJI UNIVERSITY

Economics ECONOMICS & MANAGEMENT SCHOOL, TONGJI UNIVERSITY 08-20 Monopoly • Algebraically: 1 2 2 1 MR MC MC MR MC MR MC    