Economics (Irwin Economics)
21st Edition
ISBN: 9781259723223
Author: Campbell R. McConnell, Stanley L. Brue, Sean Masaki Flynn Dr.
Publisher: McGraw-Hill Education
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Question
Chapter 11, Problem 1DQ
To determine
Pure competition in the long run and short run.
Expert Solution & Answer
Explanation of Solution
During a short run, the industry will have a precise number of companies. All of these will have a plant size that is set and is not in a position to be altered as it is there for a short run. Firms might shut down given the impression that it won't be making commodities during the short run, but they will not have adequate time to pay off its due obligations and their business will eventually close down.
In contrast, the industry, during the long run will have companies that are already in it and have ample time to either expand or minimize their size. Also, the company numbers in the industry can go up or come down as new companies enter or already present firms leave.
Economics Concept Introduction
Concept Introduction:
Pure Competition: In pure competition, the number of buyers and sellers are large. They are selling homogenous products.
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evaluate the impact of government interventions, such as antitrust regulations, price controls, or subsidies, on various market structures. Select a specific industry and examine how these interventions have influenced competition, consumer welfare, and economic efficiency. Provide the pros and cons of government intervention.
Consider an economy that exhibits both population growth (L grows at rate n) and
technological progress (A grows at rate a) described by the production function,
Y = F(K, AL) = Ka (AL)¹-α
Here K is capital and Y is output.
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[2 marks]
(c) Find expressions for the steady-state capital-output ratio, capital stock per
effective worker, and output per effective worker, as a function of the saving rate
(s), the depreciation rate (8), the population growth rate (n), the rate of
technological progress (a), and the coefficient a. (You may assume the condition
that capital per effective worker evolves according to Ak = sf (k) - (a+n+8)k.)
[5 marks]
(d) Show that at the Golden Rule steady state the saving rate for this economy is
equal to the parameter a.
[6 marks]
A firm faces the following production function,
Y = AKα L¹-a
(1)
Here Y is output, K is capital, L is fixed labour, and A is a measure of technology.
The firm uses an optimal amount of capital determined by the condition,
MPK = r +8
(2)
Where MPK is the marginal productivity of capital, r is the real interest rate, and ♪ is
the depreciation rate.
(a) Using equations (1) and (2) find an expression for K*, the optimal amount of
capital the firm should use.
[3 marks]
(b) Referring to your result from part (a), comment on what happens to K* when
each of the following variables change (holding other variables constant),
(i)
The measure of technology (A) falls
(ii)
The depreciation rate (8) increases
(iii)
The real interest rate (r) increases
[2 marks]
[2 marks]
[2 marks]
[Hint: For each of parts (i)-(iii) you are being asked to comment on what happens to
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Chapter 11 Solutions
Economics (Irwin Economics)
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