Week 16 · Study guide

Final Exam Study Guide · Weeks 1–15 (Objectives 1–8)

Principles of Microeconomics · ECON 1 Fall 2026 · Prof. Kessler Fictional sample

Course: Principles of Microeconomics (ECON 1) · Silver Oak University (fictional sample) · Prof. Kessler
This is a student-facing review page. Read it, work the fresh practice, re-derive every number, and follow the dated plan. Then run the paired Exam-Prep Tutorial and take the Practice Final for active recall. (This guide points to those two — it does not repeat them.)

Integrity note for students. Every practice item and worked number on this page is a fresh variant — new scenarios and wording — with a vetted, pre-computed answer. None of these are the live final questions. Working them builds the skill the final tests, the honest way.

What the Final Covers (read this first)


Exam	Final — cumulative, Weeks 1–15, all 8 Objectives
Format	25 items, 100 points (4 each). Mix of multiple-choice, multiple-answer, matching, and true/false — all described in words, auto-gradable. Several items are quantitative (PPF opp cost, equilibrium P & Q, PED via midpoint formula, surplus triangles, tax incidence and DWL, cost table relationships, MR = MC and profit, VMPL, Pigouvian tax).
Coverage	Obj 1 = 3 items · Obj 2 = 2 · Obj 3 = 4 · Obj 4 = 4 · Obj 5 = 2 · Obj 6 = 4 · Obj 7 = 2 · Obj 8 = 4. The back half — Objectives 5–8 — is 12 of 25, so budget the most review time there (the midterm already covered Objectives 1–4).
Weight	25% of your course grade — the single biggest assessment.
Window	Opens Mon Dec 14; due six days later. The Study Guide and Exam-Prep Tutorial post before it so you can prepare. No quiz, discussion, assignment, or workshop in Week 16. AI is not permitted on the Final.
What to bring	Yourself, rested, scratch paper for the calculations, and the one-page concept sheet you build from this guide.

How to use this guide. Each objective has four parts: (A) the key ideas in plain language, (B) the definitions / formulas / worked numbers, (C) the predictable mistakes and their cures, and (D) where to review in the module. After all eight objectives come fresh worked examples + self-check questions (with answers), a dated study plan, and how it's graded + test strategy.

Objective 1 — Scarcity, Opportunity Cost, PPF & Comparative Advantage (Weeks 1–2) · 3 items

(A) Key ideas, plain language

Scarcity forces choice; every choice has an opportunity cost — the next-best option forgone. The PPF models trade-offs: its slope IS the opportunity cost, and a bowed-out shape shows increasing opportunity cost. Comparative advantage belongs to whoever has the lower opportunity-cost ratio — not the higher output per worker.

(B) Definitions, formulas, worked numbers

Opportunity cost = value of the next-best alternative given up.
PPF: points on = efficient; inside = attainable but inefficient (idle resources); outside = currently unattainable.
Slope of PPF = opportunity cost of the good on the horizontal axis in terms of the other good.
Comparative advantage: compute each producer's opp-cost ratio (output of other good ÷ output of this good); the lower ratio wins.
Verified course numbers: Country A: 10 wheat or 5 cloth/day → opp cost of 1 cloth = 2 wheat; opp cost of 1 wheat = ½ cloth. Country B: 6 wheat or 6 cloth/day → opp cost of 1 cloth = 1 wheat. B has CA in cloth (1 < 2); A has CA in wheat (½ < 1).
Mutually beneficial terms of trade: between the two opp-cost ratios → between 1 and 2 wheat per cloth.
Positive vs. normative: positive = testable claim about what is; normative = value judgment about what ought to be.

(C) Predictable mistakes → cures

❌ "More output per worker = comparative advantage." → ✅ That's absolute advantage. CA is about lower opportunity cost, not higher productivity.
❌ "The bowed-out PPF shows decreasing opportunity cost." → ✅ It shows increasing opportunity cost (resources are specialized; as you produce more of one good, the marginal cost in the other good rises).
❌ "Any terms of trade between the two countries is mutually beneficial." → ✅ Only terms between the two opp-cost ratios benefit both.
❌ "'The minimum wage should be $20' is a positive statement." → ✅ It's normative — it contains "should." A positive statement makes a factual, testable claim.

(D) Review in the module

Week 1 → Lecture Outline, Slides (Deck 1), Lecture Tutorial 1, Workshop 1. Week 2 → Lecture Outline, Deck 2, Workshop 2.

Objective 2 — Demand, Supply & Market Equilibrium (Weeks 3–4) · 2 items

(A) Key ideas, plain language

Markets find equilibrium where Qd = Qs. Demand and supply curves shift when non-price determinants change. A change in the good's own price is a movement along, NOT a shift — this is the single most tested trap in the course.

(B) Definitions, formulas, worked numbers

Demand shifters (D shifts): income (normal vs. inferior good), price of substitutes or complements, tastes, expectations, number of buyers. Traps: A change in the good's own price → movement along.
Supply shifters (S shifts): input prices, technology, taxes/subsidies on sellers, number of sellers, expectations, weather (agricultural goods).
Comparative statics: ↑D → P↑ Q↑; ↓D → P↓ Q↓; ↑S → P↓ Q↑; ↓S → P↑ Q↓. If both curves shift, one of P or Q is indeterminate without magnitudes.
Equilibrium — algebraic solve: set Qd = Qs. Verified: Qd = 100 − 2P, Qs = −20 + 4P → 120 = 6P → P = 20, Q = 60.
Supply increase of 30 (Qs = 10 + 4P): 100 − 2P = 10 + 4P → P = 15, Q = 70. P↓, Q↑ — supply right → P down, Q up. ✓

(C) Predictable mistakes → cures

❌ "A price change shifts the curve." → ✅ Own-price change = movement along; only non-price determinants shift the curve.
❌ "Input price rises → demand falls." → ✅ Input prices are a supply determinant, not a demand determinant; supply shifts left.
❌ "When both curves shift, we always know both P and Q." → ✅ When both shift the same direction in Q, one of P or Q is indeterminate without knowing magnitudes.

(D) Review in the module

Week 3 → Lecture Outline, Deck 3. Week 4 → Lecture Outline, Deck 4, Workshop 4.

Objective 3 — Elasticity & Total Revenue (Week 5) · 4 items

(A) Key ideas, plain language

Elasticity measures responsiveness. The midpoint formula is the standard. The TR test converts elasticity into a revenue prediction. Elasticity is not slope. YED and XED classify goods.

(B) Definitions, formulas, worked numbers

PED (midpoint): %ΔQ / %ΔP, where each % change = (change)/(midpoint).
|PED| > 1 → elastic (TR and P move opposite); |PED| < 1 → inelastic (TR and P move same direction); |PED| = 1 → unit elastic (TR constant).
Verified: P = 4 → 6, Q = 80 → 60: %ΔQ = −20/70 ≈ −0.286; %ΔP = 2/5 = 0.40; PED ≈ −0.71 (inelastic). TR: 320 → 360 (P↑, TR↑ ✓).
Determinants of elasticity (more elastic when): more substitutes, longer time horizon, luxury good, larger budget share.
YED: > 0 = normal good; > 1 = luxury; < 0 = inferior (Q falls as income rises).
XED: > 0 = substitutes (A's price ↑ → B's demand ↑); < 0 = complements.
Tax incidence: falls more on the more inelastic side — regardless of who legally pays.

(C) Predictable mistakes → cures

❌ "Elasticity = slope." → ✅ Elasticity uses percentage changes and varies along a straight demand line; slope is constant.
❌ "Elastic demand → P up → TR up." → ✅ Opposite: elastic → TR falls when P rises.
❌ "Higher income always means more demand." → ✅ Only for normal goods. Inferior goods: income↑ → demand↓.
❌ "XED > 0 means complements." → ✅ XED > 0 = substitutes; XED < 0 = complements.

(D) Review in the module

Week 5 → Lecture Outline, Deck 5, Workshop 5.

Objective 4 — Surplus, Efficiency & Government Intervention (Weeks 6–7) · 4 items

(A) Key ideas, plain language

Markets at equilibrium maximize total surplus (allocative efficiency). Government controls or taxes push quantity away from equilibrium and create deadweight loss — real surplus destroyed.

(B) Definitions, formulas, worked numbers

CS = area under demand, above price = ½ × base × height (for linear demand, height = price-axis intercept − P*).
PS = area above supply, below price = ½ × base × height.
Verified (W6): P = 20 − 0.5Q, P = 4 + 0.5Q → Q = 16, P = 12. CS = ½ × 16 × (20 − 12) = 64. PS = ½ × 16 × (12 − 4) = 64. Total = 128.
Price ceiling (set below eq) → shortage (Qd > Qs). Price floor (set above eq) → surplus (Qs > Qd). Non-binding controls have no effect.
Per-unit tax: shifts taxed-side curve by the tax amount. Verified (W7): $4 tax on sellers → new Q = 12, Pb = 14, Ps = 10. Incidence: buyers +$2, sellers −$2 (50/50 here). Tax revenue = 4 × 12 = 48. DWL = ½ × 4 × (16 − 12) = 8.
Incidence rule: more burden on the more inelastic side, regardless of legal liability.

(C) Predictable mistakes → cures

❌ "CS is the area above the demand curve." → ✅ CS is under demand, above price; PS is above supply, below price.
❌ "A price floor always causes a shortage." → ✅ A binding price ceiling (below eq) causes a shortage. A binding price floor (above eq) causes a surplus. Keep ceiling/floor straight.
❌ "Whoever writes the tax check bears the full burden." → ✅ Incidence depends entirely on relative elasticities — legal liability is irrelevant.
❌ "DWL = tax revenue." → ✅ Tax revenue = tax × Q_after (a transfer to government). DWL = ½ × tax × ΔQ (surplus destroyed, not transferred). DWL < tax revenue when ΔQ is small.

(D) Review in the module

Week 6 → Lecture Outline, Deck 6, Workshop 6. Week 7 → Lecture Outline, Deck 7, Workshop 7.

Objective 5 — Production & Short-Run Costs (Week 9) · 2 items (back half — heavy)

(A) Key ideas, plain language

Inside the firm, every decision comes down to costs at the margin. The cost table and the MC-AVC-ATC relationships are the core skill.

(B) Definitions, formulas, worked numbers

TC = FC + VC. MC = ΔTC per unit of output. AVC = VC/Q. ATC = TC/Q = AVC + AFC. AFC = FC/Q (always falls).
Two golden rules: MC crosses AVC at AVC's minimum; MC crosses ATC at ATC's minimum (efficient scale).
U-shape: AVC and ATC are U-shaped (diminishing marginal returns). AFC slopes downward throughout.
Verified cost table (FC = 60):

Q	VC	TC	MC	AVC	ATC	AFC
1	40	100	40	40.0	100.0	60.0
2	70	130	30	35.0	65.0	30.0
3	90	150	20	30.0	50.0	20.0
4	120	180	30	30.0	45.0	15.0
5	160	220	40	32.0	44.0	12.0
6	210	270	50	35.0	45.0	10.0

Min AVC = $30 at Q = 3. Min ATC = $44 at Q = 5. (Pre-verified.)

Economic vs. accounting profit: accounting = TR − explicit costs; economic = TR − explicit − implicit (opportunity) costs. Economic profit can be negative even when accounting profit is positive.

(C) Predictable mistakes → cures

❌ "MC cuts ATC at ATC's maximum." → ✅ MC cuts ATC at ATC's minimum. When MC < ATC, each unit pulls ATC down; when MC > ATC, each unit pulls ATC up.
❌ "AFC eventually rises." → ✅ AFC always falls — the same fixed cost divided over more units.
❌ "Accounting profit = economic profit." → ✅ Economic profit subtracts implicit/opportunity costs too; it can be zero or negative even if accounting profit is positive.

(D) Review in the module

Week 9 → Lecture Outline, Deck 9, Workshop 9.

Objective 6 — Perfect Competition & Monopoly (Weeks 10–11) · 4 items (back half — heavy)

(A) Key ideas, plain language

Both firm types use MR = MC — but for a competitive firm P = MR (price taker), while for a monopolist MR < P and you must read P off the demand curve, never off MR. The monopolist produces less and charges more → deadweight loss.

(B) Definitions, formulas, worked numbers

Perfect competition (PC): P = MR; produce where P = MC (on rising MC above min AVC). Profit = (P − ATC) × Q. Shutdown rule: P < min AVC → shut down. Long run: entry/exit → P = min ATC, economic profit = 0.
Verified PC: at P = 40, Q = 5 (P = MC = 40). Profit = (40 − 44) × 5 = −$20. Min AVC = $30 < $40 → operate (loss $20 < FC $60).
Monopoly: MR < P. For linear demand P = a − bQ → MR = a − 2bQ (same intercept, double slope). Set MR = MC → Q_m; read P_m off demand (NOT MR).
Verified monopoly: P = 100 − 2Q → MR = 100 − 4Q; MC = 20. MR = MC: Q_m = 20, P_m = 60 (from demand). Profit = (60 − 20) × 20 = $800. Competitive benchmark: Qc = 40, Pc = 20. DWL = ½ × (40 − 20) × (60 − 20) = $400. (All pre-verified.)
Price discrimination (briefly): monopolist can raise output and profit if it can separate markets by willingness to pay; in the limit, perfect PD → zero DWL.
Long-run market structures: PC and monopolistic competition → zero LR economic profit; monopoly and oligopoly → can sustain positive profit with barriers.
Monopolistic competition: differentiated products, free entry → zero LR profit, excess capacity (firm produces on downward-sloping part of ATC, not at min ATC).
Oligopoly: few interdependent firms, strategic interaction.

(C) Predictable mistakes → cures

❌ "The monopolist reads P off the MR line." → ✅ Set MR = MC to find Q_m; go UP to the demand curve to find P_m. Reading P off MR gives you MC — the single most common monopoly error.
❌ "P = MC is the monopoly rule." → ✅ P = MC is the competitive rule. Monopoly: MR = MC, then P > MC.
❌ "A firm should shut down whenever it earns a loss." → ✅ Shut down only if P < min AVC. Operate at a loss if P > min AVC (loss < FC).
❌ "Monopolistic competition is a monopoly." → ✅ Monopolistically competitive firms have some pricing power from differentiation, but free entry drives LR profit to zero — like PC, not monopoly.

(D) Review in the module

Week 10 → Lecture Outline, Deck 10, Workshop 10. Week 11 → Lecture Outline, Deck 11, Workshop 11. Week 12 → Lecture Outline, Deck 12 (monopolistic competition & oligopoly), Workshop 12.

Objective 7 — Oligopoly, Game Theory & Factor/Labor Markets (Weeks 12–13) · 2 items (back half — heavy)

(A) Key ideas, plain language

Oligopoly behavior is strategic. Game theory gives us tools to predict it. Labor demand is derived from output demand and marginal product.

(B) Definitions, formulas, worked numbers

Dominant strategy: best choice regardless of rival's choice.
Nash equilibrium: strategy pair where neither player wants to deviate unilaterally.
Prisoner's dilemma: both have dominant strategies leading to an outcome worse than cooperation; cartels are unstable because defection is dominant.
Verified payoff matrix: (H,H) = (10,10); (L,L) = (5,5); (L,H) = (12,3); (H,L) = (3,12). Low is dominant for both (12 > 10; 5 > 3). Nash = (Low, Low) = (5,5). Jointly better at (10,10) but unstable.
VMPL = MPL × output price. Hire while VMPL ≥ wage. When VMPL = wage, add no more workers.
Verified: MPL = 20, 18, 14, 10, 6; P = $5; VMPL = 100, 90, 70, 50, 30; wage = $50. Hire 4 (worker 5: VMPL = $30 < $50).
Labor demand shifts right when: output price rises, worker productivity (MPL) rises.

(C) Predictable mistakes → cures

❌ "Nash equilibrium = the jointly best outcome." → ✅ Nash is stable (neither deviates), not necessarily efficient — the prisoner's dilemma proves it.
❌ "Dominant strategy = Nash equilibrium." → ✅ If both players have dominant strategies, the combination of those strategies IS the Nash equilibrium — but Nash can exist even without dominant strategies.
❌ "VMPL = MPL only." → ✅ VMPL = MPL × output price. If output price rises, VMPL rises and the firm hires more workers.
❌ "Labor demand depends on how many workers want jobs." → ✅ Labor demand is derived demand — it comes from the demand for the firm's output and from labor's marginal productivity.

(D) Review in the module

Week 12 → Lecture Outline, Deck 12, Workshop 12. Week 13 → Lecture Outline, Deck 13, Workshop 13.

Objective 8 — Externalities, Public Goods, Asymmetric Information & Behavioral Economics (Weeks 14–15) · 4 items (back half — heavy)

(A) Key ideas, plain language

Markets fail for four reasons: externalities, public-good characteristics, information asymmetry, and behavioral biases. Know the type of failure, its direction (over- or under-production), and the appropriate fix.

(B) Definitions, formulas, worked numbers

Negative externality: MSC > MPC → market overproduces. Fix: Pigouvian tax = marginal external cost.
Positive externality: MSB > MPB → market underproduces. Fix: subsidy = marginal external benefit.
Verified (W14): MB = 40 − Q; MPC = 4 + 0.5Q; MC_ext = $6; MSC = 10 + 0.5Q. Market eq: Q = 24, P = 16. Social optimum: Q = 20, P = 20. Pigouvian tax = $6. DWL of externality = ½ × 4 × 6 = $12. (Pre-verified.)
Coase theorem: if property rights are clear and transaction costs are low, private bargaining achieves the efficient outcome regardless of who holds the right.
Public good = non-rival (one person's use doesn't reduce another's) + non-excludable (can't keep non-payers out) → free-rider problem → private markets underprovide.
Common resource = rival + non-excludable → tragedy of the commons (overuse).
Club good = non-rival + excludable (cable TV, toll highway when not congested).
Adverse selection = hidden info before transaction (lemons market, high-risk insurance applicants). Market unravels: lemons drive out quality goods.
Moral hazard = hidden action after transaction (insured driver takes more risk). Timing is the tell: before = adverse selection; after = moral hazard.
Signaling (seller reveals info) and screening (buyer elicits info) can reduce info asymmetry.
Behavioral biases: sunk-cost fallacy (irrelevant past costs sway decisions); anchoring (over-relying on first number seen); loss aversion (losses hurt more than equal gains feel good); present bias (over-weighting immediate costs/benefits); framing (choice affected by how options are presented).
Sunk cost principle: past unrecoverable costs are irrelevant to forward-looking decisions — only future marginal costs and benefits matter.

(C) Predictable mistakes → cures

❌ "A Pigouvian tax can be set at any rate to fix an externality." → ✅ The Pigouvian tax must be calibrated exactly to the marginal external cost to reach the social optimum. Too high or too low misses it.
❌ "Adverse selection is when behavior changes after getting insurance." → ✅ That's moral hazard. Adverse selection is the pre-transaction problem — high-risk types disproportionately enter the pool.
❌ "Public goods are just goods the government provides." → ✅ A public good has two specific traits: non-rival AND non-excludable. Many government-provided goods are not public goods in this sense.
❌ "I should finish this project because I've already spent $X on it." → ✅ Sunk costs are irrelevant. Decide based on whether future benefits exceed future costs.

(D) Review in the module

Week 14 → Lecture Outline, Deck 14, Workshop 14. Week 15 → Lecture Outline, Deck 15, Workshop 15.

Fresh Practice: Worked Examples + Self-Check Questions

These are fresh variants — new numbers and contexts. None are live final questions. All answers are pre-computed and vetted.

Practice 1 — PPF (Obj 1)

Country R produces either grain or textiles. With all resources devoted to grain: 36 tons. All resources to textiles: 9 units. (Straight-line PPF.)
- (a) What is the opportunity cost of producing 1 unit of textiles?
- (b) What is the opportunity cost of producing 1 ton of grain?
- (c) If Country S has an opp cost of 1 textile = 3 tons of grain, which country has CA in grain?

Answers (pre-verified):
(a) 36/9 = 4 tons of grain per textile.
(b) 9/36 = ¼ unit of textiles per ton of grain.
(c) R: opp cost of 1 ton of grain = 1/4 textile. S: opp cost of 1 ton of grain = 1/3 textile. R's cost (1/4) < S's cost (1/3) → Country R has CA in grain.

Practice 2 — Supply & Demand (Obj 2)

Market: Qd = 80 − 2P and Qs = −10 + 3P.
- (a) Find P and Q.
- (b) Then income rises and demand increases by 10 units at every price (new Qd = 90 − 2P). Find the new P and Q.

Answers (pre-verified):
(a) 80 − 2P = −10 + 3P → 90 = 5P → P = 18, Q = 44. Check: Qd = 80 − 36 = 44; Qs = −10 + 54 = 44 ✓
(b) New eq: 90 − 2P = −10 + 3P → 100 = 5P → P = 20, Q = 50. D↑ → P↑ Q↑ ✓

Practice 3 — Elasticity (Obj 3)

Price rises from $5 to $7; quantity demanded falls from 60 to 40. Compute PED using the midpoint formula and classify.

Answer (pre-verified):
%ΔQ = (40 − 60)/((60+40)/2) = −20/50 = −0.40.
%ΔP = (7 − 5)/((5+7)/2) = 2/6 = 0.333.
PED = −0.40/0.333 = −1.2. |PED| = 1.2 > 1 → elastic.
TR check: 5 × 60 = 300 → 7 × 40 = 280 → P↑, TR↓ (confirms elastic ✓).

Practice 4 — Consumer Surplus (Obj 4)

Demand: P = 24 − 0.5Q; Supply: P = 6 + 0.25Q.
Find P and Q, then compute CS, PS, and total surplus.

Answer (pre-verified):
24 − 0.5Q = 6 + 0.25Q → 18 = 0.75Q → Q = 24, P = 12.
CS = ½ × 24 × (24 − 12) = ½ × 24 × 12 = $144.
PS = ½ × 24 × (12 − 6) = ½ × 24 × 6 = $72.
Total surplus = $216.

Practice 5 — Cost Table (Obj 5)

A firm has FC = $40. Complete the table and find min ATC and min AVC.

Q	VC	TC	MC	AVC	ATC
1	30	70	30	30	70
2	52	92	22	26	46
3	66	106	14	22	35.3
4	88	128	22	22	32
5	118	158	30	23.6	31.6
6	160	200	42	26.7	33.3

Answer (pre-verified): Min AVC = $22 at Q = 3 or Q = 4 (tied). Min ATC = $31.6 at Q = 5. (All MC = ΔTC: 30, 22, 14, 22, 30, 42 — MC falls then rises, confirming U-shape from diminishing returns.)

Practice 6 — MR = MC (Obj 6)

A monopolist faces demand P = 60 − 2Q and MC = 12 (constant). Find Q_m, P_m, and the DWL.

Answer (pre-verified):
MR = 60 − 4Q. Set MR = MC: 60 − 4Q = 12 → Q_m = 12.
P_m = 60 − 2(12) = $36 (read off demand).
Competitive benchmark: 60 − 2Q = 12 → Q_c = 24, P_c = $12.
DWL = ½ × (24 − 12) × (36 − 12) = ½ × 12 × 24 = $144.
Profit = (36 − 12) × 12 = $288.

Practice 7 — VMPL (Obj 7)

MPL schedule: worker 1 = 15, worker 2 = 12, worker 3 = 9, worker 4 = 6, worker 5 = 3. Output price = $8. Wage = $64. How many workers should the firm hire?

Answer (pre-verified):
VMPL = 15×8, 12×8, 9×8, 6×8, 3×8 = 120, 96, 72, 48, 24.
Hire while VMPL ≥ wage ($64): workers 1 ($120), 2 ($96), 3 ($72) qualify. Worker 4: $48 < $64 → stop.
Hire 3 workers.

Dated Study Plan (finals week)

When	What to do
Sun Dec 13 (tonight)	Read this Study Guide all the way through. Work Practices 1–3 by hand (PPF, supply/demand, elasticity). Build a one-page concept sheet: one line per objective.
Mon Dec 14 (Final opens)	Work Practices 4–7 (surplus, cost table, MR=MC, VMPL) by hand on scratch paper. Re-read the misconception cures for Objectives 5–8.
Tue Dec 15 (in-class review)	Come to the final review session. Bring your questions — especially the moves that still feel fuzzy.
Wed Dec 16	Run the Exam-Prep Tutorial with your approved chatbot (60–90 min). Answer the diagnostic honestly. Submit your share link + completion summary.
Thu Dec 17	Sit the Practice Final timed (same conditions as the real exam). Review every miss against this Study Guide. Identify any remaining weak spot.
Fri Dec 18 or before	Sit the Final. Rest first. Scratch paper ready. AI not permitted.

The window closes six days after Mon Dec 14. Do not leave it to the last hour.

How It's Graded + Test Strategy

25 items, 4 points each = 100 points. No partial credit on MC or T/F — one wrong selection costs 4 points.
Multiple-answer items (Q15): you must select exactly the right set for full credit. Missing one or adding a wrong one costs points.
Matching items (Q16, Q23): all rows must be matched correctly.
Test strategy:
1. Read the stem, find the move. Before looking at answers, name what economic skill the item is testing.
2. Do the math on scratch paper first. For quantitative items, derive the answer before reading the choices.
3. Eliminate with the misconception cures. For each distractor, ask: is this the classic error (shifting when you should move along, reading P off MR, etc.)?
4. Positive vs. normative quick-sort. If an answer choice contains "should," "ought," "fair," or "ought to" — it's normative, not positive.
5. Budget time. 25 items in one sitting — about 3 minutes per item. Don't spend 10 minutes on one calculation; flag it, move on, return.

~ Prof. Kessler's edition · Fall 2026 · built with thecoursemaker.com