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EC120 Lecture Notes - Lecture 13: Average Cost, Average Variable Cost, Production Function

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School
WLU
Department
Economics
Course
EC120
Professor
Ken Jackson

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EC120 Full Course Notes
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EC120 Full Course Notes
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Document Summary

Economic profit vs accounting profit: revenue calculated consistently, economic costs are no equal to accounting costs, economic profit not equal to accounting profit, assumption are firms that act to maximize economic profit. Production function: the relationship the quantity of inputs used to make a good and the quantity of output of that good, short run production function. Increase in output that arises from an additional unit of an input: consider the marginal change at a point on the production function. Marginal product of labour or marginal product of variable inputs. Derivative of the production function with respect to the specific input. Economies and diseconomies of scale: economies of scale is if the long run atc curve is declining. Increasing the scale of production would lower average costs: constant returns to scale is if the long run atc curve is flat.

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Related Questions

1. The slope of the total product curve measures

a. the marginal rate of technical substitution.

b. marginal product.

c. average product.

d. the maximum average product.

e. minimum product.

2. The Law of Diminishing Returns to a variable input (such as labor) assumes that

a. there is at least one fixed input.

b. all inputs are changed by the same percentage.

c. the firm is operating in the short run.

d. all inputs are held constant.

e. a and c.

3. An isoquant curve identifies

a. the maximum output possible, given a fixed budget.

b. the different combinations of goods the can be produced, given fixed amounts of inputs.

c. the different combinations of inputs that can be used to produce a fixed rate of output.

d. none of the above.

4. The ratio of total productivity to the total quantity of a variable input being used in production is

a. equal to marginal physical productivity of the input.

b. constant as employment levels of the input vary.

c. equal to average physical productivity of the input.

d. equal to the marginal rate of technical substitution.

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

The short-run cost function is: (Points : 1)
a. where all inputs to the production process are available
b. relevant to decisions in which one or more inputs to the production process are fixed
c. not relevant to optimal pricing and production output decision facilities
d. crucial in making optimal investment decisions in new production facilities
e. none of the above

Theoretically, in a long-run cost function: (Points : 1)
a. all inputs are fixed
b. all inputs are considered variable
c. some inputs are always fixed
d. capital and labor are always combined in fixed proportions

A linear total cost function implies that: (Points : 1)
a. marginal costs are constant as output increases
b. average total costs are continually decreasing as output increases
c. a and b
d. none of the above

Question 1

  1. If economic profits are zero

    accounting profits is less than the cost of capital.

    accounting profit is just covering the cost of capital.

    the cost of capital is negative.

    the entrepreneur should go to his/her next best alternative.

3 points

Question 2

  1. Markets provide

    information.

    prices.

    incentives.

    all of these choices.

3 points

Question 3

  1. The entrepreneur is always searching for

    positive profit.

    normal profit.

    accounting profit.

    economic profit.

3 points

Question 4

  1. Social regulations can create

    a more competitive market place.

    network externalities.

    a lower HHI.

    barriers to entry.

3 points

Question 5

  1. According to economic theory, profits are maximized where

    total revenue equals total cost.

    marginal revenue equals marginal cost.

    price and average cost are equal.

    where marginal product and average cost are equal.

3 points

Question 6

  1. Brand names help

    create commodities.

    maintain market power.

    create competition.

    keep economic profits at zero.

3 points

Question 7

  1. Entry of new firms causes

    accounting profits to go to zero.

    market share to grown.

    economic profits to go to zero.

    total revenue to be maximized.

3 points

Question 8

  1. Fixed costs

    do not vary with output

    vary with output

    do not vary with price

    vary with price

3 points

Question 9

  1. Variable costs

    do not vary with price.

    do not vary with output.

    vary with price.

    vary with output.

3 points

Question 10

  1. Value maximization means

    that managers make decision so as to increase the long-run market value of the financial claims on the firm.

    that a firm should make products that have the highest price.

    that managers make decision so as to increase the short-run market value of the financial claims on the firm.

    all of these choices.

3 points

Question 11

  1. A manager can determine if her product is viewed as a normal good or an inferior good by considering

    price elasticity.

    cross elasticity.

    income elasticity.

    advertising elasticity.

3 points

Question 12

  1. If demand is perfectly elastic,

    the smallest increase in price will cause quantity demanded to fall to zero.

    the smallest increase in price will cause demand to fall to zero.

    the smallest increase in price will cause quantity demanded to fall.

    the smallest increase in price will cause demand to fall.

3 points

Question 13

  1. If demand is perfectly elastic, then

    demand and price are inversely related.

    quantity demanded and price are inversely related.

    the demand curve is a vertical line.

    the demand curve is a horizontal line.

3 points

Question 14

  1. If price elasticity is 3.25 then

    for every one percent change in price, there will be a 3.25 percent change in quantity demanded.

    for every one percent change in price, there will be a 3.25 percent change in demand.

    for every one percent change in price, there will be a 32.5 percent change in quantity demanded.

    for every one percent change in price, there will be a .0325 percent change in quantity demanded.

3 points

Question 15

  1. If price elasticity is 3.25, then demand is

    inelastic.

    elastic.

    unitary.

    negative.