The handcart market contains many identical firms and operates perfectl competitively. Each firm has the short run total cost function STC(q) = 400+ 5q + q² and corresponding short run marginal cost function SMC(q) = 5 + 2q . Short run average total cost is SAC(q) = 400 %3D + 5+ q. A. What is each firm's short run supply curve, assuming that price is higl than the shut-down price? LUse 02 in "PS7 check vour answers" to confirm that vour answer

Microeconomic Theory
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Chapter12: The Partial Equilibrium Competitive Model
Section: Chapter Questions
Problem 12.6P
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The handcart market contains many identical firms and operates perfectly
competitively. Each firm has the short run total cost function
STC(q) = 400 + 5q+ q² and corresponding short run marginal cost
function SMC(q) = 5 + 2q . Short run average total cost is
SAC(q) =
400
+5+ q.
A. What is each fırm's short run supply curve, assuming that price is higher
than the shut-down price?
o Use Q2 in "PS7 check your answers" to confirm that your answer is
correct before continuing.
o Firm's short run supply curve, if P > Pshut-down , q° :
B. What is the shut-down price in this industry?
o Shut-down price:
B. What is the shut-down price in this industry?
o Shut-down price:
C. All firms are earning zero profits. How much is each firm producing?
o Hint: if firms earn zero profits (T = 0), then Pq= STC(q) and
P = SAC(q) . Combine this with the profit maximization rule of
P = SMC(q).
o Use Q3 in "PS7 check your answers" to confirm that your answer is
%3D
%3D
correct before continuing.
o Firm-level production: q*
D. What is the market price?
o Market price: P*
%3D
E. Market demand is QD
3090 – 2P.What is QP at the market price?
QD
F. At equilibrium, QD = Q$ = nq , where n is the number of firms in the
market. How many firms are operating in this market?
o n =
Transcribed Image Text:The handcart market contains many identical firms and operates perfectly competitively. Each firm has the short run total cost function STC(q) = 400 + 5q+ q² and corresponding short run marginal cost function SMC(q) = 5 + 2q . Short run average total cost is SAC(q) = 400 +5+ q. A. What is each fırm's short run supply curve, assuming that price is higher than the shut-down price? o Use Q2 in "PS7 check your answers" to confirm that your answer is correct before continuing. o Firm's short run supply curve, if P > Pshut-down , q° : B. What is the shut-down price in this industry? o Shut-down price: B. What is the shut-down price in this industry? o Shut-down price: C. All firms are earning zero profits. How much is each firm producing? o Hint: if firms earn zero profits (T = 0), then Pq= STC(q) and P = SAC(q) . Combine this with the profit maximization rule of P = SMC(q). o Use Q3 in "PS7 check your answers" to confirm that your answer is %3D %3D correct before continuing. o Firm-level production: q* D. What is the market price? o Market price: P* %3D E. Market demand is QD 3090 – 2P.What is QP at the market price? QD F. At equilibrium, QD = Q$ = nq , where n is the number of firms in the market. How many firms are operating in this market? o n =
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