FRQs 2-3 – Short

Overview

AP Micro FRQs 2 and 3 are the two short free-response questions on the AP Microeconomics exam. Each is worth 5 points and counts for 25% of your free-response section score, so together they make up half of Section II (the FRQ section is 33% of your total exam score). You get 60 minutes for all three FRQs, including a 10-minute reading period, which works out to roughly 12-15 minutes per short question after you've handled the long FRQ.

Short FRQs are focused, not sprawling. While FRQ 1, the long question, walks you through an elaborate economic story with multiple graphs, each short question zooms in on one model. One might be entirely game theory. The other might be externalities, price discrimination, or factor markets. Your job is to recognize the model fast and apply it precisely.

A four-function calculator is allowed on both sections of the exam. Since May 2025, the exam runs in a hybrid digital format: multiple choice in Bluebook, FRQs handwritten.

How AP Micro Short FRQs Are Scored

Each short FRQ is worth 5 points, and most parts earn exactly 1 point each. There's no partial credit ladder within a single part the way there sometimes is on a long-FRQ graph, so precision matters on every line you write.

Here are the section facts:

Across the whole FRQ section, points come from four task types. Knowing the mix tells you where to focus your practice:

Graphing carries the most weight in the section overall, but on short FRQs the graph (if there is one) is usually small and worth 1-2 points. Some short questions, like a game theory question built around a payoff matrix, may require no graph at all.

The task verbs tell you exactly how much to write. "Identify" means state the answer, no elaboration needed. "Explain" means show the reasoning with evidence. "Calculate" means perform the math and show your work (showing work is required). "Draw a correctly labeled graph" means labels are mandatory, not decorative.

How to Answer AP Micro Short FRQs, Step by Step

The short FRQs reward speed and accuracy over elaborate development. You're proving you can apply a specific economic tool correctly, not building an extended argument. Here's a workflow that fits the time you actually have.

Step 1: Identify the model in the first 30 seconds

Short FRQs telegraph their topic in the first sentence. "Two firms are considering whether to advertise" means game theory. "A monopolist can identify two distinct groups of consumers" means price discrimination. "Production of widgets creates pollution" means externalities. "A firm hires workers in a competitive labor market" means factor markets.

Once you've identified the model, commit to its toolkit. Game theory needs payoff matrix analysis. Externalities need social vs. private cost or benefit curves. Don't waste time considering frameworks from other units.

Step 2: Read every part before writing anything

Short FRQs can be tricky precisely because they're focused. Misreading one detail (which player is the row player, whether the externality is positive or negative) can cascade through every part. Spend your first minute confirming the setup. If it's game theory, verify the payoff convention: the first number in each cell belongs to the row player, the second to the column player.

Step 3: Match your answer length to the task verb

When a part asks "What will Firm A's profit be?", the answer is a number with a dollar sign, not a paragraph. Save your writing for parts that explicitly say "explain." A good explanation has three moves: state the relevant principle, apply it to the specific numbers or scenario in front of you, and state the conclusion. Two or three sentences usually does it.

Brief doesn't mean careless. If asked for a Nash equilibrium, state both players' strategies. If asked for a quantity, include units. If asked for a price, include the dollar sign.

Step 4: Show work on every calculation

Writing "Profit = $250 -$100 = $150" takes two seconds and protects you if you misread the matrix. The "Calculate" task verb requires shown work anyway. A naked number with no setup is a gamble.

Step 5: Attempt every part, then reset

With 5 points spread across roughly five parts, you can't afford to skip anything. If a calculation stalls, write your setup and move on; later parts often test the concept rather than your specific number, so a wrong value in part (b) doesn't have to sink part (c). And the two short FRQs are completely independent. Struggling on Question 2 says nothing about Question 3. Take a breath between them and start fresh.

One strategic note if you're running out of time: prioritize the question you understand better. Earning 5/5 on one and 2/5 on the other beats 3/5 on both, because complete command of one model converts to points faster than partial command of two.

Worked Example: A Game Theory Short FRQ

This is an official College Board sample short FRQ. Two discount stores, Discount Delight and Bargain Floor, are deciding whether to include a brand of athletic shoes in their sales. The first entry in each cell is Discount Delight's profit; the second is Bargain Floor's. The firms know all the information and do not cooperate.

Here's how strong answers handle each part:

(a) If Discount Delight does not include the shoes but Bargain Floor does, what is Bargain Floor's profit? Find the cell: bottom-left. The second entry is Bargain Floor's. Answer: $250. One number, one point. Done.

(b) Does either player have a dominant strategy? Check each player against both of the opponent's choices. Discount Delight: if Bargain Floor includes, including is better ($150 >$100); if Bargain Floor doesn't, not including is better ($240 >$200). The best choice flips, so no dominant strategy. Bargain Floor: if Discount Delight includes, including wins ($180 >$100); if Discount Delight doesn't, including still wins ($250 >$220). Bargain Floor has a dominant strategy: include the shoes.

(c) Using numbers from the table, explain why both stores choosing "does not include" is not a Nash equilibrium. A Nash equilibrium means no player can gain by unilaterally switching. From the (Does Not Include, Does Not Include) cell, Bargain Floor earns $220, but by switching to "includes" it would earn $250. Since Bargain Floor can profit by deviating alone, this outcome is not a Nash equilibrium. Notice the explanation cites the actual payoffs. That's what "using numbers from the table" demands.

(d) Identify the Nash equilibrium strategy for each store. Bargain Floor includes (dominant strategy). Given that, Discount Delight's best response is to include ($150 >$100). The Nash equilibrium is both stores including the shoes.

(e) If the stores could cooperate, would the outcome change? Explain. Yes. Cooperating, both would choose "does not include," earning $240 and $220, which beats the Nash payoffs of $150 and $180 for both firms. This is the classic cartel insight: the cooperative outcome is better for everyone, but it's unstable because each firm (here, Bargain Floor especially) has an individual incentive to deviate.

Topic Toolkits for the Short FRQs

Short FRQs rotate through a fairly predictable set of models. Practicing these specific applications is more efficient than trying to prepare for everything at once.

Game theory. Expect a 2x2 payoff matrix. Tasks: read payoffs correctly, identify dominant strategies (always better, not sometimes better), find Nash equilibria (check each cell for profitable unilateral deviations; there can be more than one), and compare competitive vs. cooperative outcomes (highest combined payoff).

Externalities. Negative externalities push the cost curve up: MSC (marginal social cost) lies above MPC (marginal private cost), the market overproduces, and deadweight loss is the triangle between MSC and MSB from the market quantity back to the efficient quantity. The corrective Pigouvian tax equals the external cost per unit. Positive externalities mirror this with benefit curves: MSB above MPB, underproduction, and a corrective subsidy.

Price discrimination. Know the three requirements: market power, identifiable groups with different price elasticities of demand, and the ability to prevent resale. The group with more inelastic demand pays the higher price (it follows from MR = MC in each market). Price discrimination raises profit and reduces consumer surplus; whether it improves efficiency depends on whether total output rises toward the competitive level.

Factor markets. The core rule is hire where MRP = MFC. In a competitive labor market, MFC equals the wage, so firms hire where MRP = w, and the MRP curve is labor demand. In monopsony, MFC lies above the labor supply curve (hiring one more worker raises wages for everyone), so the firm hires where MRP = MFC but pays the lower wage off the supply curve.

Common Mistakes

• Misreading the payoff matrix. Students assign payoffs to the wrong player and every answer collapses from there. Fix: confirm the convention before part (a). First number is the row player, second is the column player. Circle the relevant numbers as you go.
• Confusing Nash equilibrium with the best outcome. The Nash equilibrium is often inefficient (think Prisoner's Dilemma). When a question asks what cooperating firms would do, look for the highest combined payoff, not the equilibrium you already found.
• Drawing externality curves backward. The external effect adds to the private curve. Negative externalities put MSC above MPC; positive externalities put MSB above MPB. If your "social" curve sits below the private one for a pollution question, you've flipped it.
• Writing essays for "identify" parts. Extra sentences earn nothing and burn minutes you need elsewhere. Match output to the task verb: a number for "calculate," a stated answer for "identify," reasoning only for "explain."
• Dropping units, labels, and shown work. A price without a dollar sign, an unlabeled curve, or a calculation with no setup can all cost points that you actually knew how to earn. Showing work is required whenever the task verb is "calculate."
• Assuming price discrimination always improves efficiency. It only does if total output increases toward the competitive quantity. Higher profit alone doesn't mean less deadweight loss.

Practice and Next Steps

The single best preparation is timed reps with real and realistic questions. Work through released AP Micro past exam FRQs with a strict 12-15 minute limit per short question, then check your topic identification: did you recognize the model within 30 seconds? For instant feedback on your written responses, use Fiveable's FRQ practice with scoring, or browse the full AP Micro FRQ question bank to drill specific topics like game theory and externalities separately.

Round out your prep with the rest of the section. The long FRQ guide covers the 10-point Question 1, and the MCQ guide handles the other two-thirds of your score. When you want to see how FRQ points translate into an AP score, run your numbers through the AP Micro score calculator.