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Microeconomics
A. Firm behavior and the organization of industry I. The cost of production 1. Quick quiz
_ Accounting profit = TR – Explicit Cost
_ Economic profit = TR – (Explicit + Implicit) Key = 50 and 10
_ Diminishing marginal product explains why, as a firm’s out put increases,
the production function gets flatter, while the total cost curve gets steeper
MC= TC’(1000)= TC(1001) – TC(1000) ATC = TC/Q Key = $8 and $5
_ TC= $500 => MC= $15 => ATC decreases
_ $1000/ all the pizzas => shift ATC and AFC
_ Specialization => Output increase and TC is constant => ATC decreases
2. Problems and Applications
_ What you give up in taking some actions called the OC
_ Average total cost is falling when marginal cost is below it and rising when marginal cost is above it
_ A cost that does not depend on the quantity produced is fixed cost _ Variable cost _ P = TR – TC
_ The cost of producing one extra unit of product is the MC
OC is what you give up => rent + job quitting (550,000/ year)
_ She should not open => reason: TC=550,000/ year while TR=510,000/ year
The more hours => the flatter the curve is => Reason: diminishing marginal cost Chart Title 40 35 30 25 20 15 10 5 0 1 2 3 4 5 OC FC TC Workers Output MP TC ATC MC 0 0 20 200 100 1 20 30 300 100 2 50 40 400 100 3 90 30 500 100 4 120 20 600 100 5 140 10 700 100 6 150 5 800 100 7 155 900 100
_ MP increase then decrease => Explanation: Increase: More workers does
not reach the limit of factory, Decrease: reach the limit => more workers less land _MP increase => MC decrease
_ MC=TC(601)-TC(600)= 180,901 – 180,000 =$901 => should not _ FC=300 _ Quantity TC AMC VC AMVC 0 300 50 1 350 2 390 3 420 4 450 5 490 6 540
Similar => Reason: TC= FC (fixed)+VC Q 1 2 3 4 5 6 7 VC 10 20 40 80 160 320 640 TC 210 220 240 280 360 520 840 ATC 210 110 80 70 72 87 120