ECO230Y1 Lecture Notes - Lecture 10: Zipper, Autarky, Protectionism

95 views5 pages

greenraccoon19

30 Apr 2016

School

Department

Course

Professor

For unlimited access to Class Notes, a Class+ subscription is required.

Document Summary

The traditional trade models assume that the production technology has no economies to scale. As we assumed constant returns to scale for our trade models so far, while we will assume production has increasing returns to scale technology. Constant returns to scale: q = q(k,l) q(k,l) q. Increasing returns to scale : q = q(k,l) q(2k,2l) 3q. It means, it all inputs are, say, doubled, output will be more than doubled. Suppose we can produce the output by only labour force, at a wage of per worker. Given that output can expand faster than inputs, there are economies of scale, so average cost is falling as output scale rises. Also so far, the traditional trade models assume that output comprises a homogenous good, while we will assume that consumers prefer variety in goods and producers create product differentiation. These newer models are based on two main concepts: increasing returns to scale and product differentiation.

Related Questions

36) A firm encountering economies of scale over some range of output will have a:

a) rising long-run average cost curve.

b) falling long-run average cost curve.

c) constant long-run average cost curve.

d) rising, then falling, then rising long-run average cost curve.

37) When a firm doubles its inputs and finds that its output has more than doubled, this is known as:

a) economies of scale.

b) constant returns to scale.

c) diseconomies of scale.

d) a violation of the law of diminishing returns.

38) The larger the diameter of a natural gas pipeline, the lower is the average total cost of transmitting 1,000 cubic feet of gas 1,000 miles. This is an example of:

a) economies of scale.

b) normative economies.

c) diminishing marginal returns.

d) an increasing marginal product of labor.

39) If all resources used in the production of a product are increased by 20 percent and output increases by 20 percent, then there must be:

a) economies of scale.

b) constant returns to scale.

c) diseconomies of scale.

d) increasing the average total costs.

40) Economies and diseconomies of scale explain why the:

a) short-run average fixed cost curve declines so long as output increases.

b) marginal cost curve must intersect the minimum point of the firm's average total cost curve.

c) long-run average total cost curve is typically U-shaped.

d) short-run average variable cost curve is U-shaped.

jadeshark411

A cost-minimizing firm has the following short-run production function:
Q=f (L,K)=72L+5L²-0.2L³

a) Briefly explain why this is a short-run production function.

b) At what level of employment would be diminishing returns set in for the variable input?

c) Fin the levels of employment that define stage two in the production process.

d)If the market-determined real wage rate is $20 determine the amount of labor a cost-minimizing firm would hire in order to minimize the total cost of production.

2) a) Briefly explain the concept of "Return to scale". What form of "Return toScale" does the following production function exhibit? Explain

b) Q=f(L,K)=L^0.3 K^0.7

Suppose a cost-minimizing firm wishes to change its scale of production and needs to know the combination of labor and capital to employ. If the first's total cost outlay is $14. Fin this combination using the information below and given that the prices of labor and capita are $1 and $3 per unit respectively.

Q= 0 1 2 3 4 5 6 7 8

TPI=0 11 20 28 35 41 45 46 46.5

TPK=0 24 45 63 78 87 93 96 97

where TPI AND TPK represent the total product of labor and total product of capital respectively.

3) Given the demand and supply schedules for semiconductors in a perfectly competitive market:

Q_d=60-10P+0.5I, Q_s=-10+4P-2C

Where I=average income of the demanders of this production

C=unit cost of the inputs used in the production of this commodity.

a) Find the expression for equilibrium price and equilibrium quantity transcended in this market.

b)Find the initial equilibrium and equilibrium quantity ifI=1000 and C=20

c) Determine the impact of an increase in income from 1000 to1200 on the initial equilibrium values.

d) Assume that an improvement in the technology of producing this commodity results in an increase in supply by a factor of 5, how will this development affect the initial equilibrium values?0

roseant382

The law of eventually diminishing marginal returns: (Points : 1)

a. states that each and every increase in the amount of the variable factor employed in the production process will yield diminishing marginal returns.
b. is a mathematical theorem that can be logically proved or disproved
c. is the rate at which one input may be substituted for another input in the production process
d. None of the above

The marginal product is defined as: (Points : 1)

a. the ratio of total output to the amount of the variable input used in producing the output
b. the incremental change in total output that can be produced by the use of one more unit of the variable input in the production process
c. the percentage change in output resulting from a given percentage change in the amount of the variable input X employed in the production process with Y
d. None of the above

The rate at which one input X may be substituted for another input Y in a production process, while total output remains constant, is: (Points : 1)

a. the slope of the isoquant curve
b. the marginal rate of technical substitution

c. equal to MPx/MPy

d. all of the above
e. none of the above

Marginal revenue product is: (Points : 1)

a. defined as the amount that an additional unit of the variable input adds to the total revenue
b. equal to the marginal factor cost of the variable factor times the marginal revenue resulting from the increase in output obtained
c. equal to the marginal product of the variable factor times the marginal product resulting from the increase in output obtained
d. a and b
e. a and c

Marginal factor cost is defined as the amount that an additional unit of the variable unit of the variable input adds to ____________. (Points : 1)

a. marginal cost
b. variable cost
c. marginal rate of technical substitution
d. total cost
e. none of the above

In the Cobb-Douglas production function Q=aL^?1.K^?2 ______________. (Points : 1)

a. the marginal product of labor (L) is equal to ?1
b. the average product of labor (L) is equal to ?2
c. if the amount of labor input (L) is increased by 1 percent, then output will increase by ?1 percent
d. a and b
e. a and c