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AP Microeconomics Practice Quiz: Profit-Maximizing Behavior in Perfectly Competitive Factor Markets

Written by AP Content Team, Verified for 2026 AP Exams, Last updated: May 2026

Test your understanding with short quizzes. This quiz has 11 questions to check your progress.

Question 1 of 11

In a perfectly competitive labor market, how is the wage for a single firm determined?

All Questions (11)

In a perfectly competitive labor market, how is the wage for a single firm determined?

A) By the firm's marginal revenue product curve.

B) By the intersection of the firm's labor demand and supply.

C) By the market, making the firm a wage taker.

D) By the firm's ability to pay, based on its profits.

Correct Answer: C

According to the provided content, 'In a perfectly competitive labor market, the wage is set by the market and each firm hires the quantity of workers' at that wage. This means the firm accepts the market wage, acting as a wage taker.

A profit-maximizing firm operating in a perfectly competitive factor market will hire workers up to the point where:

A) Marginal product of labor is maximized.

B) Total revenue is maximized.

C) Marginal revenue product of labor equals the market wage.

D) The price of the output equals the wage rate.

Correct Answer: C

The content states that 'each firm hires the quantity of workers, where the marginal factor (resource) cost (wage) equals the marginal revenue product of labor.'

A firm will continue to hire additional workers in a perfectly competitive labor market as long as which of the following conditions is met?

A) The marginal revenue product of labor is greater than the market wage.

B) The marginal product of labor is increasing.

C) The firm is making an economic profit.

D) The market wage is greater than the marginal revenue product of labor.

Correct Answer: A

The provided text explicitly states, 'A typical firm hires labor in a perfectly competitive labor market as long as the marginal revenue product of labor is greater than the market wage.'

The marginal revenue product (MRP) of labor is equal to the value of the marginal product of labor (VMPL) under which specific condition?

A) The firm is a monopolist in the output market.

B) The firm operates in a perfectly competitive output market.

C) The firm experiences diminishing marginal returns.

D) The labor market is perfectly competitive.

Correct Answer: B

The content specifies that 'Firms in a perfectly competitive output market will have marginal revenue product of labor that is equal to the value of the marginal product of labor (VMPL = MPL × P).' This is because in a perfectly competitive output market, marginal revenue (MR) equals price (P).

To achieve the profit-maximizing or cost-minimizing combination of inputs, a firm should allocate its budget such that:

A) The total amount spent on each input is equal.

B) The marginal product of each input is equal.

C) The marginal product per dollar spent on each input is equal.

D) The firm hires the same quantity of each input.

Correct Answer: C

The content states, 'To minimize costs or maximize profits, firms allocate inputs such that the last dollar spent on each input yields the same amount of marginal product.' This is equivalent to the marginal product per dollar being equal for all inputs.

Which of the following correctly defines the marginal revenue product (MRP) of a factor of production?

A) The change in total product divided by the change in that factor.

B) The change in total revenue divided by the change in that factor.

C) The total revenue divided by the quantity of the factor employed.

D) The market price of the product multiplied by the total quantity of the factor.

Correct Answer: B

The provided content directly defines this term: 'Marginal revenue product of a factor of production is the change in total revenue divided by the change in that factor of production.'

A firm sells its product in a perfectly competitive output market for $5 per unit. The marginal product of the last worker hired is 10 units. What is the marginal revenue product of that worker?

A) $0.50

B) $2.00

C) $15.00

D) $50.00

Correct Answer: D

The content explains that for a firm in a perfectly competitive output market, MRP is equal to VMPL, which is calculated as MPL × P. In this case, the marginal product of labor (MPL) is 10 units and the price (P) is $5. Therefore, MRP = 10 × $5 = $50.

For a firm hiring in a perfectly competitive labor market, the marginal factor cost (MFC) of labor is:

A) Upward sloping, as more workers require a higher wage.

B) Equal to the marginal revenue product at all quantities of labor.

C) Constant and equal to the market wage.

D) Decreasing due to diminishing marginal returns.

Correct Answer: C

The content indicates that in a perfectly competitive labor market, 'the wage is set by the market.' This means the firm can hire as many workers as it wants at the prevailing market wage, making its marginal factor cost (also called marginal resource cost) a constant value equal to that wage.

A firm is using labor and capital to produce a good. The marginal product of the last dollar spent on labor is 40 units of output, while the marginal product of the last dollar spent on capital is 30 units of output. To minimize production costs, the firm should:

A) Use more capital and less labor.

B) Use less capital and more labor.

C) Maintain the current combination of labor and capital.

D) Increase the price of its output.

Correct Answer: B

According to the cost-minimization rule, firms should allocate inputs so 'the last dollar spent on each input yields the same amount of marginal product.' Since the last dollar on labor yields more output (40) than the last dollar on capital (30), the firm should reallocate spending away from capital and toward labor.

The marginal revenue product (MRP) can be calculated by which of the following formulas?

A) Marginal Product / Marginal Revenue

B) Marginal Product + Marginal Revenue

C) Marginal Product × Marginal Revenue

D) Change in Total Cost / Change in Labor

Correct Answer: C

The provided content explicitly gives the formula for marginal revenue product as 'MRP = MP × MR'.

Which of the following is a defining characteristic of a perfectly competitive factor market?

A) A single firm sets the wage for the entire market.

B) The wage is set by the market, and firms are price takers for the input.

C) Firms must pay a higher wage to attract more workers.

D) The government determines a binding wage floor for all firms.

Correct Answer: B

The content defines a perfectly competitive labor market as one where 'the wage is set by the market.' This implies that individual firms are 'wage takers' or price takers for the factor of production (labor).