Questions: Labor Demand Theory

Question 1

A firm's demand for labor is called 'derived demand' because...

• A. It is derived from government regulations about hiring
• B. It is derived from the demand for the firm's output — the firm hires workers to produce goods that consumers want to buy
• C. It is derived from workers' supply decisions
• D. It is derived from the stock market performance of the firm

Answer: (B)

Labor demand is derived from product demand because firms value labor for its contribution to output and revenue, not as an end in itself. A restaurant hires cooks because customers want food; if demand for the restaurant's food drops, demand for cooks drops too. This derived nature means that labor demand depends on product market conditions (demand elasticity, competition) as well as production technology (how productive workers are). It connects labor economics to industrial organization and product market analysis.

Question 2

A profit-maximizing firm should continue hiring workers as long as the marginal revenue product of labor exceeds the wage.

• T. True
• F. False

Answer: True

Each additional worker adds MRPL to revenue and costs w in wages. As long as MRPL > w, hiring the additional worker is profitable — they contribute more to revenue than they cost. The optimal hiring decision equates MRPL = w at the margin. Beyond this point, additional workers cost more than they produce. This condition is the firm-level foundation of the labor demand curve: at lower wages, more workers satisfy MRPL = w (because you extend further along the diminishing marginal product curve), so the demand curve slopes downward.

Question 3

According to the Hicks-Marshall rules, under what conditions will labor demand be most elastic (most responsive to wage changes)?

Model answer: Labor demand is most elastic when: (1) the price elasticity of demand for the firm's product is high (consumers are sensitive to price increases passed through from higher wages), (2) it is easy to substitute other inputs (capital, technology) for labor, (3) labor's share of total production costs is large (so wage changes significantly affect total costs), and (4) the supply of substitute factors is elastic (alternative inputs are readily available at stable prices).

These four rules jointly determine how much firms adjust employment in response to wage changes. If all four conditions hold, a wage increase leads to large employment reductions: consumers buy less of the more-expensive product, firms substitute capital for labor, the wage bill is a large fraction of costs so the price impact is significant, and capital is readily available. If none hold (inelastic product demand, no substitution possibilities, small labor share, scarce capital), firms absorb wage increases with minimal employment adjustment. These rules are essential for predicting minimum wage employment effects.