AP Microeconomics Quiz: Monopsonistic Markets

What this quiz covers

This quiz focuses on Monopsonistic Markets, giving you a quick way to practice the rules, question types, and explanations that matter most for AP Microeconomics.

How to use this quiz

Try each quiz question before looking at the correct answer. Use the explanations to review missed ideas, then come back to similar questions until the pattern feels familiar.

Question 1

1. Hire 5 workers and pay $17 per hour (correct answer)
2. Hire 6 workers and pay $18 per hour
3. Hire 6 workers and pay $23 per hour
4. Hire 7 workers and pay $19 per hour
5. Hire 5 workers and pay $24 per hour

Explanation: This question illustrates monopsonistic behavior in an agricultural processing facility. A monopsony is a market with a single buyer of labor facing an upward-sloping labor supply curve, where each additional worker requires a higher wage for all workers. The fundamental concept is that MFC (marginal factor cost) exceeds the wage because hiring one more worker means paying the higher wage to all previously hired workers. The monopsonist maximizes profit where MRP = MFC, but examining the data reveals at 5 workers, MRP ($24) > MFC ($21), while at 6 workers, MRP ($22) < MFC ($23). Students often erroneously seek exact equality, but when there's no perfect match, the firm hires the last unit where MRP exceeds MFC. The transferable strategy is to locate where MRP last exceeds or equals MFC (5 workers), then find the corresponding wage from the labor supply curve ($17 per hour).

Question 2

1. Hire 3 operators and pay $16 per hour.
2. Hire 4 operators and pay $17 per hour. (correct answer)
3. Hire 4 operators and pay $20 per hour.
4. Hire 5 operators and pay $18 per hour.
5. Hire 5 operators and pay $22 per hour.

Explanation: This question tests your understanding of monopsonistic labor markets. A monopsony is a market structure where a single buyer, here the warehouse, dominates the demand for labor and faces an upward-sloping labor supply curve, requiring higher wages to attract additional operators. The marginal factor cost (MFC) is greater than the wage because hiring one more operator means raising the wage for all operators employed. The monopsonist hires where the marginal revenue product (MRP) equals MFC, resulting in 4 operators at a wage of $17 per hour read from the supply curve. A common misconception is treating the monopsonist as a wage taker in a competitive market, setting MRP equal to wage, which would incorrectly suggest hiring more. A transferable strategy is to find the quantity where MRP equals MFC, such as at 4 operators where both are $20. Then, read the wage directly from the supply curve at that employment level.

Question 3

1. Hire 3 operators and pay $20 per hour.
2. Hire 4 operators and pay $21 per hour. (correct answer)
3. Hire 4 operators and pay $24 per hour.
4. Hire 5 operators and pay $22 per hour.
5. Hire 5 operators and pay $26 per hour.

Explanation: This question tests your understanding of monopsonistic labor markets. A monopsony is a market structure where a single buyer, here the logging company, dominates the demand for labor and faces an upward-sloping labor supply curve, requiring higher wages to attract additional operators. The marginal factor cost (MFC) is greater than the wage because hiring one more operator means raising the wage for all operators employed. The monopsonist hires where the marginal revenue product (MRP) equals MFC, resulting in 4 operators at a wage of $21 per hour read from the supply curve. A common misconception is treating the monopsonist as a wage taker in a competitive market, setting MRP equal to wage, which would incorrectly suggest hiring more. A transferable strategy is to find the quantity where MRP equals MFC, such as at 4 operators where both are $24. Then, read the wage directly from the supply curve at that employment level.

Question 4

1. Hire 4 workers and pay $14 per hour
2. Hire 5 workers and pay $15 per hour (correct answer)
3. Hire 5 workers and pay $19 per hour
4. Hire 6 workers and pay $16 per hour
5. Hire 4 workers and pay $22 per hour

Explanation: This problem illustrates monopsonistic behavior in a hotel labor market during off-season. A monopsony occurs when a single employer faces an upward-sloping labor supply, meaning higher wages are needed to attract additional workers. The fundamental principle is that MFC (marginal factor cost) exceeds the wage because the employer must pay the new higher wage to all employees, not just the marginal worker. The profit-maximizing monopsonist hires where $\text{MRP} = \text{MFC}$, but the table shows at 5 workers, $\text{MRP (20)} > \text{MFC (19)}$, while at 6 workers, $\text{MRP (18)} < \text{MFC (21)}$. A common error is assuming exact equality is required, but when there's no perfect intersection, the firm hires up to where MRP still exceeds MFC. The key strategy is to find the last worker where $\text{MRP} \geq \text{MFC}$ (5 workers), then read the wage from the supply curve ($15 per hour).

Question 5

1. Hire 5 workers and pay $20 per hour (correct answer)
2. Hire 6 workers and pay $21 per hour
3. Hire 6 workers and pay $26 per hour
4. Hire 7 workers and pay $22 per hour
5. Hire 5 workers and pay $29 per hour

Explanation: This question examines monopsonistic decision-making for a distribution warehouse. A monopsony is characterized by a single buyer of labor facing an upward-sloping labor supply curve, where attracting more workers requires raising wages for all employees. The crucial insight is that MFC (marginal factor cost) exceeds the wage because hiring an additional worker means paying the higher wage to all workers. The monopsonist maximizes profit where MRP = MFC, and examining the data shows at 5 workers, MRP ($29) > MFC ($24), but at 6 workers, MRP ($25) < MFC ($26). Students often mistakenly think the firm must find exact equality, but when there's no perfect match, the firm hires the last unit where MRP exceeds MFC. The transferable approach is to identify where MRP last exceeds or equals MFC (5 workers), then read the corresponding wage from the labor supply schedule ($20 per hour).

Question 6

1. Hire 3 workers and pay $100 per day (correct answer)
2. Hire 4 workers and pay $110 per day
3. Hire 4 workers and pay $140 per day
4. Hire 2 workers and pay $90 per day
5. Hire 3 workers and pay $120 per day

Explanation: This question requires analyzing a monopsonistic labor market for seasonal logging workers. A monopsony exists when there's a single buyer of labor facing an upward-sloping labor supply, meaning the firm must raise wages to attract more workers. The crucial distinction is that MFC (marginal factor cost) exceeds the wage because hiring an additional worker requires paying the higher wage to all workers. The profit-maximizing monopsonist hires where MRP = MFC, but this exact equality doesn't occur in the table—at 3 workers, MRP ($130) $ > $MFC ($120), while at 4 workers, MRP ($110)$ < $MFC ($140). Many students mistakenly think the firm hires at the exact intersection, but when there's no exact match, the firm hires up to where $ MRP \geq MFC$. The strategy is to find the last unit where MRP ≥ MFC, then read the wage from the supply curve—yielding 3 workers at $100 per day.

Question 7

1. Hire 4 workers and pay a wage of $12 per worker.
2. Hire 3 workers and pay a wage of $11 per worker. (correct answer)
3. Hire 2 workers and pay a wage of $10 per worker.
4. Hire 3 workers and pay a wage of $12 per worker.
5. Hire 2 workers and pay a wage of $14 per worker.

Explanation: This question tests monopsony analysis in agricultural labor markets. A monopsony occurs when a single employer (the commercial farm) dominates the labor market, facing an upward-sloping supply curve where higher wages are needed to attract more workers. The marginal factor cost (MFC) exceeds the wage because hiring an additional worker requires raising wages for all employees, not just the marginal worker. The profit-maximizing monopsonist hires where MRP = MFC, which occurs at 3 workers where MRP ($12) and MFC ($13) are closest to equal. At this quantity, the monopsonist pays the supply curve wage of $11 per worker. Students often incorrectly assume monopsonists act as wage-takers like competitive firms, but monopsonists recognize their hiring decisions influence market wages. The solution strategy remains consistent: (1) find the employment level where MRP intersects MFC, then (2) determine the wage from the supply curve at that employment level.

Question 8

1. Hire 5 workers and pay $14 per hour (correct answer)
2. Hire 6 workers and pay $15 per hour
3. Hire 6 workers and pay $20 per hour
4. Hire 7 workers and pay $16 per hour
5. Hire 5 workers and pay $19 per hour

Explanation: This problem tests understanding of monopsonistic labor markets at a theme park. A monopsony exists when there's a single employer facing an upward-sloping labor supply, requiring progressively higher wages to attract additional workers. The key principle is that MFC (marginal factor cost) exceeds the wage because the employer must pay the new higher wage to all workers, creating a wedge between wage and MFC. The profit-maximizing monopsonist hires where $\text{MRP} = \text{MFC}$, and the table shows at 5 workers, $\text{MRP (19)} > \text{MFC (18)}$, while at 6 workers, $\text{MRP (17)} < \text{MFC (20)}$. A common misconception is looking for exact $\text{MRP} = \text{MFC}$ equality, but when there's no perfect intersection, the firm hires up to where $\text{MRP} \geq \text{MFC}$ (5 workers), then read the wage from the supply schedule ($14 per hour).

Question 9

1. Hire 3 operators and pay $16 per hour.
2. Hire 4 operators and pay $17 per hour. (correct answer)
3. Hire 4 operators and pay $20 per hour.
4. Hire 5 operators and pay $18 per hour.
5. Hire 5 operators and pay $22 per hour.

Explanation: This question tests your understanding of monopsonistic labor markets. A monopsony is a market structure where a single buyer, here the warehouse, dominates the demand for labor and faces an upward-sloping labor supply curve, requiring higher wages to attract additional operators. The marginal factor cost (MFC) is greater than the wage because hiring one more operator means raising the wage for all operators employed. The monopsonist hires where the marginal revenue product (MRP) equals MFC, resulting in 4 operators at a wage of $17 per hour read from the supply curve. A common misconception is treating the monopsonist as a wage taker in a competitive market, setting MRP equal to wage, which would incorrectly suggest hiring more. A transferable strategy is to find the quantity where MRP equals MFC, such as at 4 operators where both are $20. Then, read the wage directly from the supply curve at that employment level.

Question 10

1. Hire 4 workers and pay $13 per hour
2. Hire 5 workers and pay $14 per hour (correct answer)
3. Hire 5 workers and pay $18 per hour
4. Hire 4 workers and pay $22 per hour
5. Hire 6 workers and pay $15 per hour

Explanation: This question tests your understanding of monopsonistic labor markets. A monopsony is a market with a single buyer of labor, facing an upward-sloping labor supply curve where each additional worker requires a higher wage for all workers. The key insight is that marginal factor cost (MFC) exceeds the wage because hiring one more worker means paying the higher wage to all previously hired workers. The monopsonist maximizes profit by hiring where $MRP = MFC$, which occurs at 5 workers where both equal $18. A common misconception is thinking the monopsonist pays the MFC value as the wage, but they actually pay the wage from the supply curve. The transferable strategy is: find where $MRP = MFC$ for the employment level, then read the corresponding wage from the labor supply schedule—here, 5 workers at $14 per hour.

Question 11

1. Hire 4 representatives and pay a wage of $22 per worker. (correct answer)
2. Hire 5 representatives and pay a wage of $24 per worker.
3. Hire 3 representatives and pay a wage of $20 per worker.
4. Hire 4 representatives and pay a wage of $28 per worker.
5. Hire 3 representatives and pay a wage of $32 per worker.

Explanation: This problem demonstrates monopsony in the bilingual customer service market. In a monopsony, a single employer (the call center) has market power over labor, facing an upward-sloping supply curve that requires higher wages to attract additional workers. The marginal factor cost (MFC) exceeds the wage because hiring one more representative means raising wages for all existing employees, creating costs beyond the new hire's wage. The monopsonist maximizes profit by hiring where MRP = MFC, which occurs at 4 representatives where both equal $28. At this employment level, the monopsonist pays the supply wage of $22 per worker. A common misconception is thinking monopsonists pay workers their marginal revenue product; instead, they pay the lower supply curve wage while capturing the difference as profit. To solve monopsony problems: (1) locate where MRP and MFC intersect to find optimal employment, then (2) read the corresponding wage from the labor supply schedule.

Question 12

1. Hire 3 mechanics and pay $90 per day.
2. Hire 4 mechanics and pay $95 per day. (correct answer)
3. Hire 4 mechanics and pay $110 per day.
4. Hire 5 mechanics and pay $100 per day.
5. Hire 5 mechanics and pay $120 per day.

Explanation: This question tests your understanding of monopsonistic labor markets. A monopsony is a market structure where a single buyer, here the amusement park, dominates the demand for labor and faces an upward-sloping labor supply curve, requiring higher wages to attract additional mechanics. The marginal factor cost (MFC) is greater than the wage because hiring one more mechanic means raising the wage for all mechanics employed. The monopsonist hires where the marginal revenue product (MRP) equals MFC, resulting in 4 mechanics at a wage of $95 per day read from the supply curve. A common misconception is treating the monopsonist as a wage taker in a competitive market, setting MRP equal to wage, which would incorrectly suggest hiring more. A transferable strategy is to find the quantity where MRP equals MFC, such as at 4 mechanics where both are $110. Then, read the wage directly from the supply curve at that employment level.

Question 13

1. Hire 4 workers and pay $12 per hour
2. Hire 5 workers and pay $13 per hour (correct answer)
3. Hire 5 workers and pay $17 per hour
4. Hire 6 workers and pay $14 per hour
5. Hire 4 workers and pay $19 per hour

Explanation: This question examines monopsonistic behavior in a call center labor market. A monopsony occurs when a single employer faces an upward-sloping labor supply curve, meaning higher wages are needed to attract additional workers. The fundamental principle is that MFC (marginal factor cost) exceeds the wage because hiring one more worker requires paying the higher wage to all employees. The monopsonist maximizes profit by hiring where MRP = MFC, which occurs at exactly 5 workers where both equal $17. Students often confuse the wage determination, thinking the firm pays the MFC amount, but the monopsonist actually pays according to the labor supply curve. The transferable approach is straightforward: locate where MRP = MFC to determine employment (5 workers), then find the corresponding wage from the supply schedule ($13 per hour).

Question 14

1. Hire 6 workers and pay $17 per hour
2. Hire 5 workers and pay $16 per hour (correct answer)
3. Hire 6 workers and pay $20 per hour
4. Hire 4 workers and pay $15 per hour
5. Hire 4 workers and pay $28 per hour

Explanation: This problem illustrates monopsonistic decision-making in a food-processing labor market. A monopsony is characterized by a single employer facing an upward-sloping labor supply curve, where attracting additional workers requires raising wages for all employees. The critical concept is that MFC (marginal factor cost) exceeds the wage because the employer must pay the new higher wage to all previously hired workers. The monopsonist maximizes profit where MRP equals MFC, which occurs between 5 and 6 workers—at 5 workers, MRP ($24) > MFC ($20), but at 6 workers, MRP ($20) < MFC ($22). A common error is assuming the firm hires exactly where MRP = MFC, but when there's no exact intersection, the firm hires the last unit where MRP exceeds MFC. The key strategy is to identify where MRP last exceeds or equals MFC (5 workers), then read the corresponding wage from the supply schedule ($16 per hour).

Question 15

1. Hire 6 workers and pay $19 per hour
2. Hire 5 workers and pay $18 per hour (correct answer)
3. Hire 6 workers and pay $24 per hour
4. Hire 7 workers and pay $20 per hour
5. Hire 5 workers and pay $25 per hour

Explanation: This question tests understanding of monopsonistic labor markets at an airport. A monopsony is a market structure with a single employer facing an upward-sloping labor supply curve, where each additional worker requires a higher wage for all workers. The critical concept is that MFC (marginal factor cost) exceeds the wage because hiring another worker means paying the higher wage to all previously hired workers. The monopsonist maximizes profit where MRP = MFC, but examining the table shows at 5 workers, MRP ($25) > MFC ($22), while at 6 workers, MRP ($23) < MFC ($24). Students often mistakenly look for exact equality, but when there's no perfect match, the firm hires the last unit where MRP exceeds MFC. The transferable strategy is to identify where MRP last exceeds or equals MFC (5 workers), then read the corresponding wage from the labor supply schedule ($18 per hour).

Question 16

1. Hire 4 housekeepers and pay a wage of $24 per worker.
2. Hire 3 housekeepers and pay a wage of $22 per worker. (correct answer)
3. Hire 2 housekeepers and pay a wage of $20 per worker.
4. Hire 4 housekeepers and pay a wage of $25 per worker.
5. Hire 3 housekeepers and pay a wage of $29 per worker.

Explanation: This problem demonstrates monopsony principles in the hotel housekeeping market. In a monopsony, a single employer (the island hotel) has market power over labor, facing an upward-sloping supply curve where wages must rise to attract more workers. The marginal factor cost (MFC) exceeds the wage because hiring an additional housekeeper requires raising wages for all existing workers, creating costs beyond the new hire's wage. The monopsonist maximizes profit by hiring where MRP = MFC, which occurs at 3 housekeepers where MRP ($29) is closest to MFC ($26). At this quantity, the monopsonist pays the supply wage of $22 per worker. A common error is thinking monopsonists operate like competitive firms that take wages as given, when actually they recognize their hiring decisions affect market wages. To solve monopsony problems: (1) locate the intersection of MRP and MFC curves to find optimal employment, then (2) use the labor supply schedule to identify the wage at that employment level.

Question 17

1. Hire 3 workers and pay a wage of $14 per worker. (correct answer)
2. Hire 4 workers and pay a wage of $15 per worker.
3. Hire 2 workers and pay a wage of $13 per worker.
4. Hire 2 workers and pay a wage of $17 per worker.
5. Hire 3 workers and pay a wage of $15 per worker.

Explanation: This question tests monopsony analysis in a food-processing labor market. A monopsony occurs when a single buyer of labor (the food-processing plant) faces an upward-sloping labor supply, meaning higher wages are needed to attract additional workers. The marginal factor cost (MFC) exceeds the wage because hiring one more worker requires raising wages for all employees, not just the marginal worker. The profit-maximizing monopsonist hires where MRP = MFC, which occurs at 3 workers where MRP ($15) and MFC ($16) are closest to equal. At this employment level, the monopsonist pays the supply curve wage of $14 per worker. Students often incorrectly assume monopsonists pay workers their MRP or MFC, but the wage comes from the supply curve at the chosen quantity. The solution strategy involves two steps: (1) find where MRP intersects MFC to determine employment, then (2) read the wage from the supply curve at that employment level.