AP Microeconomics 2024 FRQs

Apr 3, 2026

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This document contains a set of Free-Response Questions (FRQs) for the AP Microeconomics 2025 exam, covering various microeconomic concepts. The questions are divided into sets, with each set focusing on different scenarios and topics.

AP Microeconomics 2025 FRQs Summary

General Instructions and Format

  • Exam Structure: Section II consists of 3 questions and lasts 1 hour.
  • Materials: Paper for scratch work is allowed, but answers must be in the free-response booklet.
  • Labeling: Parts (A, B, C) and sub-parts (i, ii, iii) must be clearly labeled.
  • Writing Tools: Pencil or pen with black or dark blue ink.
  • Graphs: Correctly labeled graphs are required when useful or necessary. Axes, curves, and directional changes must be clear.
  • Calculations: Show all work for calculations.
  • Calculator: An approved handheld calculator or the application's calculator is permitted.
  • Timing: Recommended timing: 10 minutes for reading/planning, 25 minutes for Question 1, and 12 minutes each for Questions 2 and 3.
  • Navigation: Students can move between questions until time expires.

Question Set 1: Voda Reservoir (Monopoly and Labor Markets)

  • Scenario: Voda Reservoir is a monopolist in bottled water, currently earning negative economic profit.
    • Part A: Requires drawing a graph showing profit-maximizing quantity ($Q_M$), price ($P_M$), average total cost (ATC) consistent with negative profit, and deadweight loss.
    • Part B: Requires showing the socially optimal quantity ($Q_S$) on the graph.
    • Part C: Asks about the effect of a per-unit subsidy on the profit-maximizing quantity and requires an explanation.
    • Part D: Asks how the demand elasticity for Voda Reservoir's water changes with the entry of new producers.
    • Part E: Focuses on Voda Reservoir as an employer in a perfectly competitive labor market.
      • i: Asks about the effect of increased demand for bottled water on the demand for labor and requires an explanation.
      • ii: Asks about the short-run effect of a minimum age regulation on the market wage and requires an explanation.

Question Set 2: Rushland Rice Market (Market Equilibrium, Price Controls, International Trade)

  • Scenario: Analysis of the market for rice in Rushland.
    • Part A: Requires calculating the total economic surplus at market equilibrium, showing work.
    • Part B: Asks about the effect of a government-set price floor at $3 per bushel (surplus, shortage, or neither) and requires an explanation.
    • Part C: Analyzes the impact of international trade with a world price of $5 per bushel.
      • i: Determines whether Rushland will export or import rice, using graph numbers.
      • ii: Requires calculating domestic consumer surplus under international trade, showing work.
      • iii: Requires calculating the total revenue for Rushland's farmers at the world price, showing work.

Question Set 3: Deskward (Perfect Competition, Market Adjustments, Cost Analysis)

  • Scenario: Deskward is a profit-maximizing firm in a constant-cost, perfectly competitive market in long-run equilibrium, producing wooden desks.
    • Part A: Requires drawing side-by-side graphs for the market and Deskward, showing market equilibrium ($P_M, Q_M$), Deskward's profit-maximizing price/quantity ($P_F, Q_F$), and ATC consistent with long-run equilibrium.
    • Part B: Asks about the short-run effect of an increase in fixed costs (rent) on Deskward's profit-maximizing quantity and requires an explanation.
    • Part C: Analyzes the short-run effect of a per-unit subsidy on the market graph, showing new equilibrium ($P^, Q^$) and the total cost of the subsidy to the government.
    • Part D: Asks whether a binding price floor in the wooden desk market will result in a shortage, surplus, or neither, and requires an explanation.
    • Part E: Focuses on Deskward's production of chairs, providing cost data for increasing production.
      • i: Requires calculating the long-run average total cost (LRATC) of producing 500 chairs, showing work.
      • ii: Asks whether Deskward is experiencing economies of scale, diseconomies of scale, or the efficient scale when increasing production from 500 to 600 chairs, requiring an explanation with numbers.

Question Set 4: Quartz Excavations (Monopsony and Labor Markets)

  • Scenario: Quartz Excavations is the sole employer of miners in a town, operating in a labor market. A graph shows Marginal Factor Cost (MFC) and Marginal Revenue Product (MRP) of labor.
    • Part A: Requires identifying Quartz Excavations' profit-maximizing number of miners.
    • Part B: Asks whether the wage paid to the profit-maximizing number of miners will be equal to, greater than, or less than $15, requiring an explanation with numbers.
    • Part C: Requires calculating the total wage bill for Quartz Excavations if a minimum wage of $25 is imposed, showing work.
    • Part D: Analyzes the impact of an increase in the demand for quartz.
      • i: Asks whether the marginal revenue product (MRP) of miners will increase, decrease, or remain the same, requiring an explanation.
      • ii: Asks whether the marginal factor cost (MFC) of the last miner hired will be greater than, less than, or equal to the MFC before the demand increase.

Question Set 5: Lucy's Utility Maximization (Consumer Choice)

  • Scenario: A table shows Lucy's marginal utility (MU) for Goods X and Y.
    • Part A: Asks how many units of each good Lucy will consume to maximize total utility if both goods are free.
    • Part B: Requires calculating Lucy's total utility from consuming 2 units of Good X and 2 units of Good Y, showing work.
    • Part C: Analyzes Lucy's optimal consumption with prices ($P_X = $2, P_Y = $4$) and a budget ($B = $20$).
      • i: Asks for the maximum quantity of Good Y Lucy can buy if she purchases 2 units of Good X.
      • ii: Requires identifying Lucy's optimal combination of Goods X and Y, explaining using marginal analysis and numbers.
    • Part D: Asks to classify the relationship between Goods X and Y (complementary, substitute, normal, inferior) based on given price elasticities of demand ($E_{D,X} = -2.0, E_{D,Y} = -0.8$) and cross-price elasticity ($E_{XY} = +1.6$), requiring an explanation.

Question Set 6: Tony's Trinkets & Bitaly's Bracelets (Game Theory)

  • Scenario: A payoff matrix for two firms, Tony's Trinkets and Bitaly's Bracelets, who independently and simultaneously choose strategies (Unique/Typical jewelry for Tony's; Gold/Silver jewelry for Bitaly's).
    • Part A: Asks if producing Unique jewelry is Tony's best choice if Bitaly produces Silver, requiring an explanation with numbers from the matrix.
    • Part B: Asks if Bitaly has a dominant strategy (Gold, Silver, or neither), requiring an explanation with numbers.
    • Part C: Requires identifying all Nash equilibria for the game.
    • Part D: Asks for the minimum profit increase for Tony's Typical jewelry to become a dominant strategy, given a scenario where its profit increases regardless of Bitaly's choice.
    • Part E: Analyzes the scenario where the firms cooperate and merge to maximize combined profits, requiring calculation of the maximum combined profit.

Here's a summary of the provided content, focusing on the AP Microeconomics Free-Response Questions and Scoring Guidelines.

AP Microeconomics 2017 Free-Response Questions Summary

This document outlines three free-response questions from the 2017 AP Microeconomics Exam, along with their corresponding scoring guidelines. The questions cover various microeconomic concepts, including market structures, firm behavior, costs, elasticity, and market interventions.

Question 1: Monopoly and Firm Behavior

This question focuses on a monopolist operating a gas station and analyzes its decisions under different profit scenarios.

  • Part (a): Monopoly Graph in February (Negative Economic Profit)

    • Requires drawing a correctly labeled graph for a monopolist.
    • Key elements to show:
      • Downward-sloping demand (D) and marginal revenue (MR) curves.
      • Marginal cost (MC) curve rising and intersecting ATC at its minimum.
      • Average total cost (ATC) curve above the demand curve at the profit-maximizing output.
      • Profit-maximizing output ($Q_J$) where $MC = MR$.
      • Profit-maximizing price ($P_J$) determined on the demand curve above $Q_J$.
      • Shaded area representing deadweight loss.

  • Part (b): Reason for Continued Operation

    • Joyce continues to operate despite negative economic profits if total revenue covers total variable costs (or $P_J > AVC$). This means she is covering her variable costs and contributing to her fixed costs.

  • Part (c): Impact of Decreased Fixed Costs

    • A decrease in fixed costs does not change the profit-maximizing quantity. This is because fixed costs do not affect marginal cost, and profit maximization occurs where $MR = MC$.

  • Part (d): Monopoly in July (Positive Economic Profit & Suboptimal Price)

    • Scenario: Demand increases, leading to positive economic profit, but Joyce realizes a lower price would have yielded higher profits.
    • (i) Marginal Revenue vs. Marginal Cost: At the quantity sold in July, marginal revenue (MR) was less than marginal cost (MC). This indicates that producing more would have increased profits, or that the current output is beyond the point where $MR = MC$.
    • (ii) Impact of Price Decrease on Quantity Demanded: A price decrease would cause the quantity demanded to increase.
    • (iii) Impact of Price Decrease on Total Revenue: A price decrease would cause total revenue to increase. This is explained by the fact that the decrease in price occurs in the elastic region of the demand curve, meaning the percentage increase in quantity demanded is greater than the percentage decrease in price.

Question 2: Perfect Competition and Firm Costs

This question examines a firm operating in a perfectly competitive market, focusing on cost calculations and profit maximization.

  • Part (a): Average Total Cost (ATC) Calculation

    • Given: Fixed Cost (FC) = $240, Price (P) = $60.
    • Requires calculating ATC for producing 6 trumpets using the provided Total Variable Cost (TVC) data.
    • Formula: $ATC = \frac{TC}{Q} = \frac{FC + VC}{Q}$ or $ATC = AFC + AVC$.
    • Example Calculation (from scoring guidelines): $ATC = \frac{$240 + $120}{6} = $60$.

  • Part (b): Marginal Cost (MC) Calculation

    • Requires calculating the MC of producing the 11th trumpet using the TVC data.
    • Formula: $MC = \frac{\Delta TC}{\Delta Q} = \frac{\Delta VC}{\Delta Q}$ (since fixed costs don't change).
    • Example Calculation (from scoring guidelines): $MC_{11th} = VC_{11} - VC_{10}$ (assuming TVC for 10th is known from table). The scoring guideline indicates $100.

  • Part (c): Profit-Maximizing Quantity

    • Brody's firm maximizes profit by producing where Marginal Revenue (MR) equals Marginal Cost (MC).
    • In perfect competition, $P = MR$. Therefore, Brody should produce where $P = MC$.
    • Explanation: The firm should produce up to the last unit where $MR \ge MC$.
    • Example Result (from scoring guidelines): Profit-maximizing quantity is 9 trumpets, where $MR = $60$ and $MC$ is just below $60$ (e.g., $55$ for the 9th unit, $70$ for the 10th).

  • Part (d): Profit or Loss Calculation

    • Requires calculating profit/loss at the profit-maximizing quantity.
    • Formula: $Profit = TR - TC = (P \times Q) - (FC + VC)$.
    • Example Calculation (from scoring guidelines): Profit = $($60 \times 9) - ($240 + $220) = $540 - $460 = $80$.

  • Part (e): Perfectly Competitive Firm Graph (Loss)

    • Requires drawing a correctly labeled graph for a perfectly competitive firm experiencing a loss at a market price of $200.
    • Key elements to show:
      • Horizontal demand curve (d) at $P = $200$.
      • MC curve intersecting ATC at its minimum.
      • ATC curve above the demand curve at the profit-maximizing quantity ($Q^*$).
      • Profit-maximizing quantity ($Q^*$) where $MC = MR$ (or $P$).
      • Shaded area representing the loss.

Question 3: Market Supply, Demand, and Taxes

This question analyzes a product market using supply and demand, and then introduces the impact of a per-unit tax.

  • Part (a): Price Elasticity of Supply

    • Requires determining if the price elasticity of supply is less than, equal to, or greater than one, based on the provided diagram (not shown here, but implied to be a supply curve).
    • Explanation: If the supply curve is horizontal, the elasticity is infinite (perfectly elastic), which is greater than one. If it's upward sloping, the elasticity depends on the curve's steepness. The scoring guidelines suggest a horizontal supply curve.

  • Part (b): Consumer Surplus Calculation

    • Requires calculating consumer surplus at the equilibrium price using the demand curve from the diagram.
    • Formula: $Consumer Surplus = \frac{1}{2} \times \text{base} \times \text{height}$ (area of the triangle below the demand curve and above the equilibrium price).
    • Example Calculation (from scoring guidelines): $1/2 \times 80 \times $4 = $160$.

  • Part (c): Impact of a Per-Unit Tax on Producers

    • A per-unit tax of $1 is imposed on producers.
    • (i) Total Revenue Received by Producers: Total revenue received by producers will decrease. The tax shifts the supply curve upward, leading to a higher price paid by consumers and a lower price received by producers (after paying the tax).
    • (ii) Producer Surplus: Producer surplus will stay the same or remain zero. This implies that before the tax, producers were already earning zero economic profit (or were at their shutdown point), and the tax exacerbates this or keeps it at zero.
    • (iii) Total Surplus: Total surplus will decrease. This is because the tax creates a deadweight loss (inefficiency) by reducing the quantity traded below the socially optimal level. The decrease in consumer surplus is greater than the tax revenue collected.

Additional Information Provided

  • Multiple-Choice Answer Key: Lists correct answers for specific multiple-choice questions (4, 9, 15, 24, 27, 34, 39, 45, 54, 57).
  • Scoring Worksheets and Conversion Charts: Details how exam scores are calculated and converted.
  • Question Descriptors and Performance Data: Provides information on the content assessed by each multiple-choice question and student performance data.
  • Exam Administration Instructions: Includes detailed instructions for proctors and students regarding the administration of the exam, including timing, materials, and procedures for both multiple-choice and free-response sections.
  • Released Exam Questions: The document also includes the text of the free-response questions from the 2017 AP Microeconomics Exam, covering topics like:
    • Question 1 (Corn Market): Perfect competition, market and firm graphs, short-run vs. long-run adjustments, and the impact of price changes (including substitution effects).
    • Question 2 (Production Function): Returns to scale, marginal product, diminishing marginal returns, average total cost, and hiring decisions in competitive markets.
    • Question 3 (Monopoly with Externality): Monopoly pricing, negative externalities, social optimality, and the impact of corrective taxes.

This summary provides a structured overview of the key concepts and requirements presented in the provided AP Microeconomics exam materials.

This document appears to be a collection of answers to economics-related questions, covering topics such as market structures, profit maximization, elasticity, and labor markets. The content is repetitive, with several sections presenting the same information. The summary below consolidates and organizes these repeated points.

Summary of Economic Concepts and Calculations

This summary synthesizes information from the provided text, organizing it into distinct economic scenarios and calculations.

Pineapple Market Analysis

  • Accounting Profit: The accounting profit in this market is zero.
  • Market Entry: The number of firms in the pineapple market is expected to increase. This is because, in the short run, Paolo's firm is earning a profit, which will attract new firms to enter the market.
  • Pricing Power: Pablo's pineapple farm's price will be greater than its marginal revenue. This is because the farm's product is differentiated, meaning it is not a perfectly competitive firm. This differentiation allows the firm to raise prices and earn more profit.
  • Income Elasticity of Demand:
    • The calculation for income elasticity is presented as: Income elasticity = 8% Income / 4% = 0.3.
    • The percentage change in quantity demanded for pineapples is calculated as: Qd = 0.3 * 10% = 3%.
    • Therefore, the percentage change in the quantity demanded of pineapple would be 3%.

Grand Power Company Analysis

  • Profit Maximization:
    • The profit-maximizing price for the Grand Power Company is $0.8 per hour.
    • The profit-maximizing quantity is 40 kilowatt-hours.
  • Demand Elasticity: At the profit-maximizing point, the demand for the Grand Power Company is elastic. This is because, at this point, marginal revenue (MR) is still positive, indicating elastic demand.
  • Government Proposals Analysis:
    • Proposal 1:
      • If the government chooses Proposal 1, the Grand Power Company will charge $0.40 per hour.
      • The company will produce 120 kilowatt-hours.
      • The deadweight loss for Proposal 1 is calculated as $4. This is represented by a triangular area from $0.2 to $0.4 and 120 to 160 kilowatt-hours: (0.4 - 0.2) * (160 - 120) / 2 = $4.
      • Consumer surplus under Proposal 1 is $24, calculated as (0.8 - 0.4) * 120 / 2.
    • Proposal 2:
      • Consumer surplus under Proposal 2 is $48, calculated as (0.8 - 0.2) * 100 / 2.
      • Proposal 2 offers a greater consumer surplus compared to Proposal 1.

Labor Market and Profit Maximization (Industries X, Y, Z)

  • Total Revenue Calculation: The total revenue is calculated as $2 * 80 = $160.
  • Marginal Revenue Calculation:
    • Marginal revenue is defined as the change in total revenue divided by the change in the quantity of workers.
    • The marginal revenue of the second worker is $60.
  • Profit Maximization (Industry Z):
    • The profit-maximizing condition is where Marginal Revenue (MR) equals Marginal Cost (MC).
    • The MC is constant at $35.
    • Industry Z should hire 3 workers, as this is the closest point where MR (40) is near MC (35).
  • Diminishing Marginal Returns: Industries Y and Z experience diminishing marginal returns.
  • Maximizing Total Profit (Penelope):
    • If Penelope decides to hire a tenth worker, they should hire from Industry X.
    • This is because the 10th worker in Industry X has the highest marginal revenue (MR), which will maximize total profit.

AP Microeconomics Practice Exam - 2018 Administration

This document outlines the structure, instructions, and scoring guidelines for the 2018 AP Microeconomics Practice Exam. It is intended for AP exam preparation and is provided by the College Board.

I. Exam Security and Distribution

  • Purpose: This released exam is for AP Exam preparation.
  • Distribution Restrictions:
    • Cannot be posted on school or personal websites.
    • Cannot be electronically redistributed.
    • Teachers may download and make copies for classroom use only.
  • Security Measures: Teachers must collect all exam materials after administration and store them securely.
  • Consequences of Unauthorized Distribution: Violation of copyright policies may lead to termination of Practice Exam access for the school and removal from other online services.

II. Exam Structure and Timing

The AP Microeconomics Exam consists of two sections:

  • Section I: Multiple-Choice Questions
    • Total Time: 1 hour and 10 minutes
    • Number of Questions: 60 (may vary slightly)
    • Percent of Total Score: 66.67%
    • Calculator: Not permitted
    • Writing Instrument: Pencil required
  • Section II: Free-Response Questions
    • Total Time: 1 hour (includes a 10-minute reading period and a 50-minute writing period)
    • Number of Questions: 3 required free-response questions
    • Percent of Total Score: 33.33%
    • Calculator: Not permitted
    • Writing Instrument: Pen with black or dark blue ink

III. Proctoring Instructions

  • Required Materials for Proctors:
    • 2017-18 AP Coordinator's Manual
    • 2017-18 AP Exam Instructions book
    • AP Exam Seating Chart template
    • School Code and Homeschool/Self-Study Codes
    • Container for students' electronic devices (if needed)
    • Extra No. 2 pencils with erasers
    • Extra pens with black or dark blue ink
    • Signs for the door (e.g., "Cell phones are prohibited during the test administration, including breaks")
  • Pre-Exam Checks:
    • Macroeconomics: Ensure Section I booklet covers are blue. Large-type/photo-enlarged exams will have black titles.
    • Microeconomics: Ensure all exam covers are black.
  • Exam Administration Steps:
    • Start Time: Begin at the designated time.
    • Seating Chart: Complete a seating chart for the exam.
    • Exam Title Confirmation: Instruct students to verify the exam title on their packet.
    • Agreement to Policies: Students agree to AP Program policies by opening the packet.
    • Labeling: Students must place AP Exam labels and AP Number labels correctly on their answer sheets.
    • Section I (Multiple-Choice):
      • Use a No. 2 pencil.
      • Mark answers on pages 2 and 3 of the answer sheet.
      • No credit for answers written in the exam booklet.
      • Margins or blank spaces in the booklet can be used for scratch work.
      • Time: 1 hour and 10 minutes.
      • End of Section: Students close booklets, place answer sheets face up, and wait for collection.
    • Break: A 10-minute break occurs between Section I and Section II. Students cannot access exam materials or electronic devices during the break.
    • Section II (Free-Response):
      • Use a pen with black or dark blue ink.
      • Reading Period: 10 minutes for planning. Students may write notes on designated pages but not on pages that will be scored.
      • Writing Period: 50 minutes.
      • Responses must be written on lined pages within the booklet.
      • Extra paper may be requested; it must be stapled to the first page of the corresponding question.
      • End of Section: Students close booklets, place them face up, and wait for collection.
  • Post-Exam Procedures:
    • Collect all exam materials.
    • Check identification information on Section II booklets.
    • Return electronic devices.
    • Remind students about score release and the confidentiality of exam content.
    • Provide seating charts to the AP Coordinator.
    • Complete Incident Reports for students using extra paper.
    • Securely store all exam materials until shipped back to the AP Program.
    • Fill in the "School Use Only" section on the answer sheet for score reporting.
    • Mark fee reduction eligibility if applicable.

IV. Student Answer Sheet Details

  • Section I: Used for multiple-choice answers (pages 2 and 3).
  • Marking: Use a No. 2 pencil, filling circles darkly and completely. Erase changes thoroughly.
  • Identification Areas: Include Larea Code, Phone Number, Student ID, Mailing Address, etc.
  • Demographic Information: Race/Ethnic Group, Parental Education Level, etc.
  • Fee Reduction: Mark eligibility if applicable.
  • School Use Only: Section Number is used for accessing score reports.

V. Free-Response Scoring Guidelines (Examples)

The document includes detailed scoring guidelines for specific free-response questions, outlining the points awarded for correct answers and explanations. Key examples include:

  • Question 1 (Perfectly Competitive Market):
    • Points awarded for correctly labeled graphs (market and firm), identifying equilibrium price/quantity ($P_M, Q_M$), firm's profit-maximizing price/quantity ($P_F, Q_F$), relationship between $P_M$ and $P_F$ (they are equal in long-run equilibrium), impact of increased rent (short-run quantity unchanged, potential loss; long-run decrease in firms, decrease in market quantity, increase in market price).
  • Question 2 (Market Failure):
    • Points awarded for identifying sources of market failure (e.g., negative externality, monopoly), explaining them using graph information ($MSC > MPC$, $P > MR$), identifying profit-maximizing quantity and price, identifying quantity and price after a tax, and evaluating government intervention based on social welfare maximization.
  • Question 3 (Price Floor):
    • Points awarded for correctly graphing a price floor above equilibrium, identifying quantity purchased ($Q_F$), determining allocative efficiency ($MB > MC$), shading producer surplus, and analyzing the impact on total consumer spending based on demand elasticity.

VI. Scoring and Performance Data

  • Scoring Worksheet: Used to calculate a weighted composite score from Section I and Section II scores.
  • AP Score Conversion Chart: Translates the composite score into an AP score (1-5).
  • Question Descriptors and Performance Data: Provides information on the content assessed by each multiple-choice question and student performance data. Topics covered include:
    • Basic economic concepts
    • The nature and functions of product markets
    • Market failure and the role of government

VII. College Board Mission

The College Board is a not-for-profit organization dedicated to connecting students to college success and opportunity by promoting excellence and equity in education. It serves millions of students annually through programs like the SAT and AP.

Summary of Microeconomics Practice Exam Content

This document contains practice questions and answer keys for an AP Microeconomics exam, covering various core concepts in microeconomic theory. The content is divided into sections related to market economies, production possibilities, market equilibrium, price elasticity, consumer choice, production costs, market structures (oligopoly, monopolistic competition, monopoly), factor markets, government intervention, and international trade.

Section 1: Elasticities and Demand for Movie Tickets

This section focuses on the application of elasticity concepts to a movie theater's pricing decisions.

  • Key Elasticities Provided:

    • Short-run price elasticity of demand for movie tickets: 0.85 (inelastic)
    • Long-run price elasticity of demand for movie tickets: 3.2 (elastic)
    • Cross-price elasticity of demand for good X (another theater product) with respect to movie ticket price: -0.26 (complementary goods)
    • Income elasticity of demand for movie tickets: 0.75 (normal good)

  • Analysis of Price Changes:

    • (a) Short-run impact of a 10% price increase: With an inelastic short-run elasticity of 0.85, a 10% price increase will lead to a 8.5% decrease in quantity demanded (10% * 0.85 = 8.5%).
    • (c) Long-run impact on total revenue from a price increase: In the long run, demand is elastic (3.2). If prices increase, the percentage decrease in quantity demanded will be larger than the percentage increase in price, leading to a decrease in total revenue.
    • (b) Difference between short-run and long-run elasticity: The long-run elasticity is higher because consumers have more time to find substitutes or adjust their behavior in response to price changes. In the short run, options are more limited.

  • Analysis of Other Elasticities:

    • (d) Normal vs. Inferior Good: Movie tickets are a normal good because the income elasticity of demand is positive (0.75). This means that as income rises, the demand for movie tickets increases.
    • (e) Impact on Demand for Good X: Since the cross-price elasticity is negative (-0.26), good X is a complement to movie tickets. A price increase in movie tickets (as in part a) will lead to a decrease in the demand for good X. This would be illustrated by a leftward shift of the demand curve for good X.

Section 2: International Trade in Wheat for AgroIsland

This section analyzes the impact of international trade on a small country's wheat market.

  • Initial Situation (No Trade):

    • Domestic equilibrium price of wheat: $10 per bushel.
    • The market is competitive.
    • A graph would show the standard supply and demand curves, with equilibrium at $10 and quantity Q*.
    • Domestic Producer Surplus (PS) would be the area above the supply curve and below the $10 price, up to Q*.

  • Situation with Free Trade:

    • World market price of wheat: $20 per bushel.
    • Since the world price ($20) is higher than the domestic equilibrium price ($10), AgroIsland will become an exporter of wheat.
    • Domestic Quantity Supplied (Qp) will increase significantly as producers respond to the higher world price. The quantity supplied will be determined by the supply curve at the $20 price.
    • Domestic Consumer Surplus (CS) will decrease. Consumers will face the higher world price of $20, and the quantity demanded will fall to a level determined by the demand curve at $20. The CS will be the area below the demand curve and above the $20 price, up to the new, lower quantity demanded.

  • Changes due to Trade:

    • (c) Impact on Surpluses:
      • Domestic Consumer Surplus: Decreases.
      • Domestic Producer Surplus: Increases significantly due to the higher price received for a larger quantity supplied.

Section 3: Microeconomics Concepts and Answer Key Explanations

This part of the document provides explanations for correct and incorrect answers to multiple-choice questions, covering a broad range of microeconomic topics. Key themes and concepts include:

  • Market Economies: Defined by private ownership of resources and reliance on market prices for allocation.
  • Production Possibilities Curve (PPC): A bowed-out PPC indicates increasing opportunity costs, meaning the cost of producing more of one good rises as more of it is produced.
  • Complements and Substitutes: Goods are complements if a price increase in one leads to a decrease in demand for the other (negative cross-price elasticity). Goods are substitutes if a price increase in one leads to an increase in demand for the other (positive cross-price elasticity).
  • Supply and Demand Shifts: Factors like input costs (wages, equipment rental), technology, and prices of related goods affect supply. Consumer income, tastes, and prices of related goods affect demand.
  • Price Elasticity of Demand:
    • Elastic demand (|Ed| > 1): Price and total revenue move in opposite directions.
    • Inelastic demand (|Ed| < 1): Price and total revenue move in the same direction.
    • Unit elastic demand (|Ed| = 1): Total revenue remains constant when price changes.
  • Consumer Utility Maximization: Consumers maximize utility by allocating their budget such that the marginal utility per dollar spent is equal across all goods consumed (MUx/Px = MUy/Py).
  • Marginal Benefit: Represents the additional satisfaction or value a consumer derives from consuming one more unit of a good, equivalent to the maximum price they are willing to pay for that unit.
  • Consumer Surplus: The difference between the maximum price a consumer is willing to pay and the actual price paid. It is represented by the area under the demand curve and above the market price.
  • Production Costs: Includes fixed costs (FC), variable costs (VC), total cost (TC = FC + VC), average fixed cost (AFC), average variable cost (AVC), average total cost (ATC), and marginal cost (MC). MC is the change in TC from producing one more unit.
  • Profit Maximization: Firms maximize profit by producing at the quantity where marginal revenue (MR) equals marginal cost (MC). In perfectly competitive markets, P = MR.
  • Returns to Scale: A long-run concept describing how output changes in response to a proportional change in all inputs (constant, increasing, or decreasing returns to scale).
  • Market Structures:
    • Perfect Competition: Many firms, identical products, free entry/exit, price takers. Long-run economic profit is zero.
    • Monopoly: Single seller, unique product, high barriers to entry.
    • Oligopoly: Few dominant firms, strategic interdependence, barriers to entry.
    • Monopolistic Competition: Many firms, differentiated products, low barriers to entry.
  • Factor Markets: Firms hire inputs (labor, capital) up to the point where the marginal revenue product (MRP) of the input equals its marginal factor cost (MFC). In competitive factor markets, MFC equals the input price (e.g., wage).
  • Externalities: Costs or benefits imposed on third parties not directly involved in a transaction. Negative externalities (like pollution) lead to overproduction relative to the social optimum, while positive externalities lead to underproduction.
  • Government Intervention: Tools like price floors, price ceilings, taxes, and subsidies can alter market outcomes, affecting prices, quantities, and surpluses.
  • Trade: Countries specialize in producing goods where they have a comparative advantage (lower opportunity cost) and trade to achieve mutual gains.
  • Lorenz Curve: Illustrates income inequality by showing the cumulative percentage of income held by cumulative percentages of the population.

This document contains the 2024 AP® Microeconomics Free-Response Questions, which assess students' understanding of core microeconomic concepts through problem-solving scenarios. The questions cover topics such as firm production, market equilibrium, government intervention, and market structures.

Question 1: Arzeye Pharma (Monopoly)

This question focuses on a pharmaceutical company, Arzeye Pharma, which holds a patent, acting as a barrier to entry, and is currently earning positive economic profits.

  • Part (a): Graphing the Profit-Maximizing Monopolist

    • Students are asked to draw a graph illustrating:
      • The profit-maximizing quantity ($Q^*$)
      • The profit-maximizing price ($P^*$)
      • An average total cost (ATC) curve consistent with positive economic profit
      • The area representing consumer surplus

  • Part (b): Revenue Maximization

    • Students must identify the quantity ($Q_R$) that maximizes total revenue on the graph.
    • They need to determine the elasticity of demand at $Q_R$ (elastic, inelastic, or unit elastic).

  • Part (c): Perfect Price Discrimination

    • Students are to show the lowest price ($P_2$) Arzeye Pharma would charge under perfect price discrimination.
    • They must explain the impact on consumer surplus.

  • Part (d): Patent Expiration

    • Students need to explain how the demand for Arzeye Pharma's treatment will change (become more elastic, less elastic, or not change) after the patent expires.

Question 2: Lowen Feline (Short-Run Production)

This question examines the short-run production function of Lowen Feline, a profit-maximizing firm producing cat food. The firm sells its product at a market price of $10 per bag and hires workers at a market wage of $18.

  • Part (a): Average Fixed Cost (AFC)

    • Given a fixed cost of $90, students must calculate the AFC when 6 workers are hired.

  • Part (b): Marginal Cost (MC)

    • Assuming labor is the only variable input, students need to calculate the marginal cost when output increases from 27 to 30 units.

  • Part (c): Diminishing Marginal Returns

    • Students must identify the specific worker hired at which diminishing marginal returns begin, using numerical evidence from the (unprovided) table.

  • Part (d): Profit-Maximizing Employment

    • Using marginal analysis, students need to determine the profit-maximizing number of workers Lowen Feline will hire.

  • Part (e): Economies of Scale (Long-Run Analysis)

    • This part shifts to long-run analysis for a rival company, Gato Food. Students must determine if Gato Food is experiencing economies of scale, diseconomies of scale, or constant returns to scale as its production increases from 40 to 50 units and its total cost increases from $600 to $900. Numerical explanation is required.

Question 3: Backpack Market (Perfect Competition & Government Intervention)

This question analyzes the market for backpacks in Jambo, which is characterized by perfect competition and no externalities. A graph of market supply and demand is provided.

  • Part (a): Total Economic Surplus

    • Students must calculate the total economic surplus at the market equilibrium, showing their work.

  • Part (b): Price Ceiling

    • The government imposes a price ceiling of $60 per backpack to lower prices for students. Students must explain whether the quantity of backpacks purchased will increase, decrease, or remain unchanged compared to the market equilibrium.

  • Part (c): Per-Unit Subsidy

    • The government provides a $30 per-unit subsidy to sellers.
      • (i) Students need to identify the price consumers will pay per backpack after the subsidy.
      • (ii) They must calculate the total cost of the subsidy to the government.
      • (iii) Students need to explain whether the subsidy increases, decreases, or leaves deadweight loss unchanged compared to the market equilibrium.

General Instructions

  • Time Allocation: The exam is 1 hour, with a 10-minute reading period and a 50-minute writing period. Students are advised to spend approximately half the writing time on Question 1 and divide the rest equally between Questions 2 and 3.
  • Diagrams: Correctly labeled diagrams are encouraged or required for explanations. Axes, curves, and directional changes must be clearly indicated.
  • Calculations: All calculations must show the steps taken to reach the final answer.
  • Response Format: Answers must be written in a separate Free Response booklet, not in the question booklet. Each question should begin on a new page.
这里有6套AP科目真题，我今年要考了，很焦虑，帮我统计一下高频知识点，对应核心terms，中英输出，table展现

苡甜甜甜，以下是结合你提供的6套AP微观经济学真题整理的【高频知识点统计表】，包括中英文对照和核心术语，非常适用于考前复习！

| 高频知识点（中文） | 高频知识点（英文） | 核心术语（英文） | 术语（中文） | |------------------------|-------------------------------|-------------------------------|-------------------------| | 供需关系及均衡 | Supply & Demand (Equilibrium) | Supply, Demand, Equilibrium Price, Shortage, Surplus | 供给，需求，均衡价格，短缺，过剩 | | 完全竞争市场/厂商行为 | Perfect Competition | Price Taker, Marginal Cost (MC), Marginal Revenue (MR), Profit Maximization | 价格接受者，边际成本，边际收益，利润最大化| | 垄断与垄断竞争 | Monopoly & Monopolistic Competition | Barrier to Entry, Price Discrimination, Deadweight Loss, Natural Monopoly | 进入壁垒，价格歧视，无谓损失，自然垄断 | | 厂商成本结构及利润 | Firm Costs & Profit | Average Total Cost (ATC), Average Variable Cost (AVC), Fixed Cost, Total Cost (TC), Accounting/Economic Profit | 平均总成本，平均可变成本，固定成本，总成本，会计/经济利润| | 弹性相关 | Elasticity | Price Elasticity of Demand, Cross-price Elasticity, Income Elasticity | 价格弹性，交叉价格弹性，收入弹性 | | 消费者最大效用/最优化选择 | Consumer Utility / Optimization| Marginal Utility (MU), Diminishing Marginal Utility, Utility Maximization | 边际效用，边际递减效用，效用最大化 | | 市场失灵与政府干预 | Market Failure & Government Intervention | Negative/Positive Externality, Public Goods, Price Floor, Price Ceiling, Tax, Subsidy | 负/正外部性，公共物品，价格下限，上限，税收，补贴 | | 要素市场/劳动力市场 | Factor Markets / Labor Market | Marginal Revenue Product (MRP), Marginal Factor Cost (MFC), Monopsony | 边际收益产品，边际要素成本，买方垄断 | | 国际贸易与比较优势 | International Trade & Comparative Advantage | Exports, Imports, World Price, Consumer/Producer Surplus | 出口，进口，世界价格，消费者/生产者剩余 | | 博弈论及策略行为 | Game Theory & Strategic Behavior| Payoff Matrix, Dominant Strategy, Nash Equilibrium | 支付矩阵，占优策略，纳什均衡 |

详细说明举例（附加中文解释，帮助你理解易考点）：

  • 供需关系及均衡

    • 核心考点：画出供需图表，找出均衡点，分析出现价格上限/下限时的市场变化。
    • 例题：政府干预设置价格上限，导致短缺分析等。

  • 厂商市场结构与利润最大化

    • 核心考点：知道完全竞争和垄断下的利润最大化条件，MC=MR；熟悉图形。
    • 例题：给出成本、收益函数，求最大利润点。

  • 弹性分析

    • 重点：区分短期和长期的价格弹性，如何影响总收入。
    • 例题：价格上涨10%，需求下降多少，判断需求弹性等。

  • 市场失灵与政府干预

    • 核心考点：税收、补贴对市场均衡、总剩余、死重损失的影响。
    • 例题：征税后，消费者生产者剩余、死重损失如何变化。

  • 消费者剩余/最优选择

    • 核心考点：最大化效用的分配条件 $\frac{MU_x}{P_x} = \frac{MU_y}{P_y}$
    • 例题：消费者如何在有限预算内选购两种产品。

  • 要素市场

    • 重点：劳动力雇佣决策，MRP和MFC，买方垄断的雇佣与工资比较。
    • 例题：求最优雇员数量及工资。

  • 国际贸易

    • 核心考点：比较优势、贸易后剩余分析、关税/配额效应等。
    • 例题：本国产品世界价格高于本地价格，出口还是进口？剩余变化？

  • 博弈论

    • 重点：理解占优策略、纳什均衡（Payoff matrix解读）。
    • 例题：二厂商决策矩阵分析，找纳什均衡。

高频核心术语单元（方便你记忆）

| 术语英文 | 术语中文 | |---------------------|----------------| | Marginal Cost (MC) | 边际成本 | | Marginal Revenue (MR) | 边际收益 | | Average Total Cost (ATC) | 平均总成本 | | Price Elasticity | 价格弹性 | | Deadweight Loss | 无谓损失 | | Consumer Surplus | 消费者剩余 | | Producer Surplus | 生产者剩余 | | Utility Maximization | 效用最大化 | | Nash Equilibrium | 纳什均衡 | | Dominant Strategy | 占优策略 |

温馨提示：考前建议重点复习上表中的知识点、公式及解题步骤，多结合公式做对应真题练习。祝你考试顺利，遇到不会的随时问我！

如需针对某一知识点详细讲解或刷题，欢迎点名告诉我~
（专属记忆：如你有需要，我可以长期为你记住这些重点，帮你构建高频考点词典！）

叫我apmaster，价格弹性知识点我没学好，可以给我具体讲讲，配上真题教教我

好的，apmaster！下面我用中英双语、包含例题+详细讲解，帮你彻底搞懂“价格弹性”这个AP微观高频考点。你会看到考纲要素、如何计算、典型真题和解题技巧，最终不会再怕遇到Elasticity！

1. 核心知识梳理（中英对照）

| 术语英文 | 术语中文 | 英文定义 & 计算公式 | 中文解释 | |:------------------:|:---------------:|:----------------------------------------------|:-------------------------------------------:| | Price Elasticity of Demand | 需求的价格弹性 | The percentage change in quantity demanded divided by the percentage change in price. $\text{Ed} = \frac{%\ \text{change in Qd}}{%\ \text{change in P}}$ | 指当商品价格变化1%时，需求量变化的百分比。 | | Elastic Demand | 富有弹性需求 | $|Ed| > 1$ | 需求对价格极为敏感，涨价会使销量大减。 | | Inelastic Demand | 缺乏弹性需求 | $|Ed| < 1$ | 需求对价格不敏感，涨价影响销量不大。 | | Unitary Elasticity | 单位弹性 | $|Ed| = 1$ | 价格变动引起等比例的销量变动，总收入不变。 | | Total Revenue | 总收入 | $TR = P \times Q$ | 总收入=价格×销量。用于判断价格弹性和收入关系。 |

2. 常考要点 & 解题方法

常见考法：

  • 计算弹性/判断弹性类型
  • 给定弹性值和价格变动，求销量变动
  • 判断提价/降价对总收入（Total Revenue）的影响

解题思路：

  1. 算公式 $\text{Ed} = \frac{%\ \Delta Q}{%\ \Delta P}$
  2. 判断绝对值大小（大于1、等于1、小于1）
  3. 用TR法则判断收入变化：
    • 需求有弹性（$|Ed|>1$）：P↑→TR↓；P↓→TR↑
    • 需求无弹性（$|Ed|<1$）：P↑→TR↑；P↓→TR↓
    • 单位弹性（$|Ed|=1$）：P变→TR不变

3. 真题讲解（来自AP官方近年卷，见下划线引用）

【真题1：计算与判定类型】

题目：

The price elasticity of supply is defined as the percentage change in the quantity supplied of a good divided by the percentage change in the price of the good. Given the value for the elasticity and the percentage change in the price, the resulting percentage change in the quantity supplied can be determined as follows: percentage change in quantity supplied $= ($elasticity$ \times $the percentage change in price$)$ [47]

解析： 已知Elasticity=2, Price上升10%，求数量变动 $$ \text{Percentage change in Q} = \text{Elasticity} \times \text{Percentage change in P} = 2 \times 10% = 20% $$ 答案： 数量将上升20%。弹性系数越大，数量对价格越敏感。

【真题2：弹性与收入变化】

题目：

If the monopolist increases the price, its total revenue will decrease (not increase) because the percentage decrease in output outweighs the percentage change in price. Therefore, raising the price will decrease total revenue. [41]

解析： 富有弹性的区间（Elastic region, $|Ed|>1$）：价格↑，销量下降更多，总收入（TR）下降！ $$ \text{TR change} = \text{Price change} + \text{Qd change} $$ 如果价格弹性>1，说明顾客流失速度比涨价速度更快，总收入减少。

【真题3：单位弹性和TR】

题目：

Unitary elasticity ($|Ed|=1$): Total revenue remains constant when price changes. [整理自AP教材]

解析： 单位弹性时，无论价格涨跌，总收入不变！ $$ \Delta \text{TR} = 0 $$

【真题4：生活应用】

题目：

The short-run price elasticity of demand for movie tickets is 0.85 and the long-run elasticity is 3.2. It means, in the short run, demand is inelastic, but in the long run, it becomes elastic. [来自AP历年卷]

解析：

  • 短期弹性$<1$： 电影院涨价10%，观众减少的比例$= 0.85 \times 10% = 8.5%$，总收入是涨的。
  • 长期弹性$>1$： 观众有更多替代选项，涨价反而会让总收入下降。

结论： 弹性不仅取决于商品本身，也取决于时效与替代品。

【真题5：交叉弹性（补充）】

题目：

The cross-price elasticity between good X and Y (CRXY) can be calculated as the ratio of the percentage change in the quantity of good Y to the percentage change in the price of good X. Thus, CRXY =(-20%/10%) = - 2 (not -0.5). [47]

解析： 交叉弹性用于判断互为替代品还是互补品：$\text{CR}_{XY}>0$ 是替代品，$<0$ 是互补品。

4. 高级建议 + 记忆口诀

  • 口诀：有弹性，涨价愁；无弹性，涨价牛。
  • 举例：有弹性（iPhone壳），一涨价大家不买；无弹性（刚需药物），再贵还得买。

一键总结表 | Summary Table

| 分类 | 英文原文 | 计算/规律 | 总收入变化规律 | |--------------|-------------------------------|-------------|--------------------------------------------| | 有弹性 ($|Ed|>1$) | Elastic Demand | >1 | $P \uparrow \implies TR \downarrow$，$P \downarrow \implies TR \uparrow$ | | 无弹性 ($|Ed|<1$) | Inelastic Demand | <1 | $P \uparrow \implies TR \uparrow$，$P \downarrow \implies TR \downarrow$ | | 单位弹性 ($|Ed|=1$)| Unitary Elastic Demand | =1 | 不变（No change） |

apmaster，有不会的弹性小题都可以发给我，或者需要刷题/再举实际生活例子随时问！
你如果想把本解读记忆进“错题本/易混知识点”，也可以让我帮你记住～

Ask Sia for quick explanations, examples, and study support.