Week 16 — Lecture Outline · Final Review & Exam
Course: Principles of Macroeconomics (ECON 2) · Silver Oak University (fictional sample) · Prof. Ashford
Objectives covered: cumulative — Objectives 1–8 (Weeks 1–15). Obj 1 — the macro perspective, scarcity, the PPF & positive vs. normative; Obj 2 — measuring output: GDP, real vs. nominal & the deflator; Obj 3 — measuring inflation & unemployment; Obj 4 — growth & the rule of 70; Obj 5 — the AD–AS model & the business cycle; Obj 6 — fiscal policy & the multiplier; Obj 7 — money, banking, the Fed & monetary policy; Obj 8 — the Phillips curve, the quantity theory & the open economy.
SLOs touched: A (macroeconomic modeling & quantitative analysis — compute GDP, a price index, a rate, apply a multiplier, shift AD–AS or the money market) · B (applying macroeconomic reasoning to policy; positive vs. normative; weighing the schools of thought fairly)
Meeting pattern: 2 sessions × 75 min = 150 min. Segment minutes below total ~150; scale to your section.
This is the final review-and-exam week — no new content. Each segment briskly re-teaches one or two objectives with its highest-yield ideas, one signature worked example (with every step shown), and the single misconception most likely to cost points. Built to be taught from cold as a capstone review: every definition, worked number, and curve-shift direction travels with the segment. This week's only graded item is the Final (25%) — there is no quiz, no discussion, no assignment, and no workshop. The Final pairs with a Study Guide + Exam-Prep Tutorial + Practice Final, built separately and referenced here by name. (All worked numbers below are pre-computed and independently re-verified — fresh values, distinct from the ones used on the Final itself.)
Week at a Glance
| The week's big question | "Across the whole course — how do we measure the economy (GDP, the deflator, the CPI, the unemployment rate), how does it grow, which curve shifts and which way in AD–AS, what does fiscal policy do through the multiplier, what does the Fed do through the money market and the transmission mechanism, what does the Phillips curve and the quantity theory tell us about inflation, and how does the economy connect to the rest of the world through trade and exchange rates — can I do each move on demand and name the trap that sinks it?" |
| By the end of the week, students can… | (1) re-run each objective's core move on demand — state opportunity cost from a PPF and separate positive from normative claims (Obj 1); compute GDP via C+I+G+NX and the GDP deflator (Obj 2); compute the CPI, the inflation rate, the unemployment rate, and the LFPR (Obj 3); compute a growth rate and apply the rule of 70 (Obj 4); identify which curve shifts in AD–AS, which direction, and the resulting P & Y, and diagnose an output gap (Obj 5); apply the spending multiplier and distinguish the deficit from the debt (Obj 6); apply the money multiplier, read the money market, and trace the transmission mechanism (Obj 7); use the Phillips curve and MV = PQ, compute comparative advantage, and read an exchange-rate move (Obj 8); (2) name and avoid the highest-cost misconception in each theme; (3) walk into the Final knowing its coverage, its weight (25%), and a concrete plan built around the Study Guide, Exam-Prep Tutorial, and Practice Final. |
| Key vocabulary (all review) | macro vs. micro, scarcity, opportunity cost, PPF (efficient/inefficient/unattainable), positive vs. normative; GDP, the expenditure approach (C+I+G+NX), real vs. nominal, the GDP deflator; CPI, the inflation rate, the unemployment rate, the labor-force participation rate (LFPR), frictional/structural/cyclical unemployment, discouraged workers; growth rate, the rule of 70, sources of growth; AD, SRAS, LRAS, comparative statics, recessionary/inflationary gap; expansionary vs. contractionary fiscal policy, the spending multiplier 1/(1−MPC), automatic stabilizers, deficit (flow) vs. debt (stock); functions of money, M1/M2, fractional-reserve banking, the money multiplier 1/RR, the Fed's structure & tools, the money market, the transmission mechanism; the short-run Phillips curve, the long-run vertical Phillips curve, MV = PQ, long-run neutrality; comparative advantage, opportunity-cost ratios, terms of trade, the trade balance; appreciation vs. depreciation, net exports, the balance of payments; Keynesian vs. classical/monetarist schools |
| Materials | slides (Deck 16 — the final-review deck), the Study Guide, the Exam-Prep Tutorial (AI), the Practice Final, scratch paper for the quantitative pockets, one approved chatbot (Gemini / Claude / ChatGPT) for the AI-audit moment |
| Timing note | 8 segments, ~150 min total. Session 1 (Mon) = Segments 1–4 (~76 min): the map + Objectives 1–4 (the macro perspective → GDP → inflation & unemployment → growth). Session 2 (Wed) = Segments 5–8 (~74 min): Objectives 5–8 (AD–AS & fiscal policy → money & the Fed → the Phillips curve & the open economy → the Final frame). Scale to your own pattern. |
Segment 1 — Hook & the Map of the Whole Course (10 min) · Session 1 opens
Hook. Put one line on the board with no comment: "The economy grew 3% last quarter, so the government did a good job." Ask: "True or false — and how do you know?" Let the room react, then point out they're reaching for exactly the move the whole course taught: separate what a model measures (positive) from a value judgment about credit or blame (normative). (The growth figure, if accurate, is a positive/testable claim; whether it reflects good policy — and who deserves credit — is contested and normative.)
- "That instinct — to separate what the economy is doing from what we think about it — is the entire course, sixteen weeks and eight objectives. They line up into one story: how we measure an economy, how it grows, how it swings in the short run, what the government's tools can do, what the Fed's tools can do, how inflation and unemployment relate, and how the economy connects to the rest of the world. Today we walk the whole story once, fast, and find the exact spot in each chapter where points get lost. That's the Final."
The promise (write it on the board): "By Wednesday you'll be able to take any of the eight big moves — compute a GDP, read a deflator, compute a CPI or unemployment rate, apply the rule of 70, shift a curve, apply a multiplier, read the money market, trace the transmission mechanism, use the Phillips curve, compute a comparative advantage, read an exchange rate — and state the one mistake that sinks each one."
The map (one slide, say it out loud):
FOUNDATIONS: Obj 1 the macro perspective, scarcity, the PPF & positive vs. normative. Obj 2 measuring output: GDP, real vs. nominal & the deflator. Obj 3 measuring inflation & unemployment. Obj 4 growth & the rule of 70.
THE SHORT RUN & POLICY TOOLS: Obj 5 the AD–AS model & the business cycle. Obj 6 fiscal policy & the multiplier.
MONEY & MONETARY POLICY: Obj 7 money, banking, the Fed & the transmission mechanism.
INFLATION THEORY & THE OPEN ECONOMY: Obj 8 the Phillips curve, the quantity theory, comparative advantage & exchange rates.
Why it matters line (memory hook): "Macroeconomics is one sentence: we measure the whole economy, model why it swings, and use two toolkits — the government's and the Fed's — to try to steady it, all while keeping straight what the model predicts from what we think should be done about it."
Segment 2 — Objectives 1 & 2 Review: The Macro Perspective & Measuring GDP (20 min)
Re-teach Obj 1 in plain language. Macroeconomics studies the whole economy — growth, inflation, unemployment, and the policies that move them — versus microeconomics, which studies individual choosers. Scarcity forces trade-offs at any scale; the PPF shows the maximum combinations of two goods an economy can produce with fixed resources. Points on the frontier = efficient; inside = attainable but inefficient (idle resources — the macro reading is unemployment, a recession preview); outside = unattainable. Positive economics states testable claims about what is; normative economics states value judgments about what ought to be.
Re-teach Obj 2 in plain language. GDP (the expenditure approach) = C + I + G + NX, where NX = exports − imports. Excluded: transfer payments (no new production), used-good sales (already counted when new), purely intermediate goods (counted once, in the final good), and purely financial trades. Real GDP strips out price changes so we can compare output across time; nominal GDP uses current prices. The GDP deflator = nominal GDP ÷ real GDP × 100 — a deflator above 100 means prices have risen since the base year.
One quick worked example (do the arithmetic out loud — pre-verified):
GDP & the deflator. A fictional economy reports (in billions): C = 620, I = 260, G = 180, X = 130, M = 150.
- NX = 130 − 150 = −20 (a trade deficit — still added to GDP as a negative number).
- GDP = 620 + 260 + 180 + (−20) = $1,040 billion.
- If nominal GDP is $1,040B and real GDP is $832B, the deflator = 1,040 ÷ 832 × 100 = 125 (prices are 25% above the base year). (Pre-verified.)
Highest-cost misconception + cure:
- ❌ "A point inside the PPF is unattainable." → ✅ An interior point is attainable but inefficient — idle resources, not impossibility. Unattainable points lie strictly outside the frontier.
- ❌ "The GDP deflator = real GDP ÷ nominal GDP × 100." → ✅ Flipped. The deflator is nominal ÷ real × 100 — flipping it is the single most common formula error in this unit.
Segment 3 — Objectives 3 & 4 Review: Inflation, Unemployment & Growth (22 min)
Re-teach Obj 3 in plain language. The CPI prices a fixed basket of goods each period: CPI = (current basket cost ÷ base-year basket cost) × 100. The inflation rate is the percentage change in the CPI between two periods — never confuse the CPI level with the inflation rate. The unemployment rate = unemployed ÷ labor force × 100, where the labor force = employed + unemployed (only those actively searching count as unemployed). The labor-force participation rate (LFPR) = labor force ÷ adult population × 100. Discouraged workers (stopped searching) are not counted in the labor force at all. Types: frictional (normal search churn), structural (skills/location mismatch), cyclical (tracks the business cycle).
Re-teach Obj 4 in plain language. The growth rate = (new − old) ÷ old × 100. The rule of 70: years to double ≈ 70 ÷ growth rate — always divide, never multiply. Sources of long-run growth: physical capital, human capital, and technology (the Solow growth model is named factually as the workhorse framework, not derived at this level).
One quick worked example (do the arithmetic out loud — pre-verified):
CPI & unemployment. A fixed basket costs $180 in the base year (30 units of good A @ $4 + 15 units of good B @ $4). In year 2 the same basket costs $198 (good A now $4.40, good B now $4.40).
- CPI = 198 ÷ 180 × 100 = 110. Inflation rate = (110 − 100) ÷ 100 × 100 = 10%.
- Labor market: adult population 150M; employed 108M; unemployed 12M (searching). Labor force = 108 + 12 = 120M. Unemployment rate = 12 ÷ 120 × 100 = 10%. LFPR = 120 ÷ 150 × 100 = 80%. (Pre-verified.)Growth & the rule of 70. Real GDP rises from $500B to $525B → growth rate = (525−500)/500×100 = 5%. At a steady 5% growth rate, years to double ≈ 70 ÷ 5 = 14 years. (Pre-verified.)
Highest-cost misconception + cure:
- ❌ "A CPI of 110 means 110% inflation." → ✅ The inflation rate is the percentage CHANGE between two CPI readings, not the index number itself. A CPI of 110 (base = 100) means 10% inflation.
- ❌ "Rule of 70: multiply the rate by 70." → ✅ Divide 70 by the growth rate. Multiplying (the classic slip) gives a nonsensical answer.
Segment 4 — Objective 5 (Part A) Review: AD–AS & Comparative Statics (20 min) · Session 1 closes (~76)
Re-teach in plain language. AD slopes down via the wealth, interest-rate, and exchange-rate effects; a change in the price level itself is a movement ALONG AD, not a shift. AD shifts right when C, I, G, or NX rises (including expansionary fiscal or monetary policy) → P↑, Y↑; AD left → P↓, Y↓. SRAS shifts left when input/oil prices rise or expected inflation rises → P↑, Y↓ (stagflation); SRAS right → P↓, Y↑. LRAS shifts right only with more resources, capital, or technology — a long-run growth event, not a short-run swing.
One quick worked example (do the algebra out loud — pre-verified):
AD–AS comparative statics. AD: P = 22 − Y/180. SRAS: P = 8 + Y/180 (Y in billions, P a price-level index).
- Initial equilibrium: 22 − Y/180 = 8 + Y/180 → 14 = 2Y/180 → Y* = 1,260, P* = 15.
- Government spending rises → AD shifts right to P = 25 − Y/180. New equilibrium: 25 − Y/180 = 8 + Y/180 → 17 = 2Y/180 → Y* = 1,530, P* = 16.5. (P↑, Y↑ — the expansionary result.) (Pre-verified.)
Highest-cost misconception + cure:
- ❌ "A change in the price level shifts AD." → ✅ The price level is AD's own-axis variable — a change in it is a movement along the curve. Only a change in a determinant of AD (C, I, G, NX, or policy) shifts the whole curve.
- ❌ "An oil-price spike shifts AD left." → ✅ An input-cost shock is a supply-side event — it shifts SRAS left, producing stagflation (P↑, Y↓ together), not a demand-side AD shift.
Segment 5 — Objective 5 (Part B) & Objective 6 Review: Output Gaps & Fiscal Policy (20 min) · Session 2 opens
Hook back in: "Session 1 was measurement and the model. Now: what happens when actual output misses potential, and what can the government's fiscal tools do about it?"
Re-teach output gaps in plain language. Potential output (Y*) is what the economy can produce at full employment. Actual output below potential = recessionary gap; actual output above potential = inflationary gap. Okun's law (named factually, a rule of thumb, not a precise law) links the size of a gap to cyclical unemployment.
Re-teach fiscal policy in plain language. Expansionary fiscal policy (G↑ or T↓) aims to close a recessionary gap; contractionary (G↓ or T↑) aims to cool an inflationary gap. The spending multiplier = 1/(1−MPC); ΔY = ΔG × multiplier. Automatic stabilizers (unemployment insurance, progressive taxes) act without new legislation. Deficit (spending − revenue, a flow, this year only) accumulates into the debt (a stock — the running total).
One quick worked example (do the arithmetic out loud — pre-verified):
Output gap. Potential output Y* = $1,300B; actual real GDP = $1,235B. Gap = 1,300 − 1,235 = $65 billion, which is 65 ÷ 1,300 × 100 = 5% of potential — a recessionary gap.
Multiplier. MPC = 0.75, so the multiplier = 1 ÷ (1 − 0.75) = 4. A $25B rise in government spending → ΔY = 25 × 4 = $100 billion.
Deficit vs. debt. Revenue = $460B, spending = $500B → deficit = $40 billion (a flow). Prior debt = $1,200B → new debt = 1,200 + 40 = $1,240 billion (a stock). (All pre-verified.)
Interaction — positive/negative verdict rapid-fire (~5 min): five short statements on a slide; thumbs-up/thumbs-down.
- "A recessionary gap means actual output is below potential." (positive — factually true in the model)
- "The government should always run a deficit during a recession." (normative — value judgment)
- "A multiplier of 4 means a $25B spending increase raises GDP by $100B." (positive)
- "We ought to prioritize paying down the national debt over stimulus." (normative)
- "A deficit this year reduces the national debt." (positive — and FALSE; a deficit ADDS to the debt; only a surplus reduces it)
Highest-cost misconception + cure:
- ❌ "A deficit reduces the debt." → ✅ A deficit (spending > revenue) adds to the debt. Only a surplus (revenue > spending) reduces it.
- ❌ "The multiplier is 1/MPC." → ✅ The multiplier is 1/(1−MPC). Using 1/MPC (or multiplying by MPC directly) is the classic formula-confusion error.
Segment 6 — Objective 7 Review: Money, Banking & the Fed (24 min)
Re-teach money & banking in plain language. Money serves as a medium of exchange, store of value, and unit of account. Fractional-reserve banking: a new deposit creates required reserves = deposit × RR; the rest becomes a loan, which becomes a new deposit elsewhere, repeating. The money multiplier = 1/RR — the theoretical upper bound on total money-supply expansion (real banks may hold excess reserves).
Re-teach the Fed & the money market in plain language. The Fed's tools: open-market operations (buying bonds → MS↑ → r↓; selling → MS↓ → r↑), the discount rate, the reserve requirement, and interest on reserves (IOR) — raising any of the latter three tends to lower the money supply (r↑). In the money market, money demand slopes down against the interest rate; money supply is set (vertical) by the Fed. An interest-rate change moves along money demand — it does not shift it.
Re-teach the transmission mechanism in plain language. The full chain: MS↑ → r↓ → investment (I) ↑ → AD shifts right → P↑, Y↑. Contractionary monetary policy reverses every arrow.
One quick worked example (do the arithmetic out loud — pre-verified):
Money multiplier & the T-account. At RR = 12.5%, the money multiplier = 1 ÷ 0.125 = 8. A new $1,500 deposit: required reserves = 1,500 × 0.125 = $187.50; the first loan = 1,500 − 187.50 = $1,312.50; the theoretical maximum money-supply expansion = 1,500 × 8 = $12,000.
The money market & transmission. Money demand: r = 15 − M/125. Money supply vertical at M = 900 → r = 15 − 900/125 = 7.8%. The Fed buys bonds, raising MS to 1,050 → r = 15 − 1,050/125 = 6.6% (a 1.2-point drop). Suppose investment rises $18 per point of rate drop → ΔI = 1.2 × 18 = $21.6B; with a multiplier of 4, ΔY = 21.6 × 4 = $86.4B; AD shifts right; P↑, Y↑. (All pre-verified.)
Highest-cost misconception + cure:
- ❌ "An interest-rate change shifts money demand." → ✅ The interest rate is money demand's own-axis variable — a rate change is a movement along the curve. Only a change in income, prices, or expectations shifts money demand itself.
- ❌ "Fiscal and monetary policy are the same thing." → ✅ Fiscal = Congress's spending & tax tools; monetary = the Fed's money-supply & interest-rate tools. Two different institutions, two different toolkits — mixing them up is one of the term's most consequential errors.
Segment 7 — Objective 8 Review: The Phillips Curve, MV = PQ & the Open Economy (22 min)
Re-teach the Phillips curve & MV = PQ in plain language. The short-run Phillips curve (SRPC) slopes down — lower unemployment tends to come with higher inflation, in the short run. The long-run Phillips curve (LRPC) is vertical at the natural rate of unemployment — in the long run, there is no permanent tradeoff (treating the SR tradeoff as permanent is the classic error). A rise in expected inflation shifts the SRPC up/right. The quantity theory: MV = PQ (money supply × velocity = price level × output). Long-run neutrality: a rise in the money supply (with V and Q fixed) raises P proportionally.
Re-teach the open economy in plain language. Comparative advantage: compute each producer's opportunity-cost ratio for a good; the lower ratio wins the comparative advantage (not the higher output — that's absolute advantage). A mutually beneficial terms of trade lies between the two opportunity-cost ratios. Exchange rates: if $1 buys more foreign currency than before, the dollar has appreciated (making U.S. exports pricier abroad and imports cheaper at home — NX falls); if $1 buys less, the dollar has depreciated (NX rises). The balance of payments: the current account and the financial account mirror each other.
One quick worked example (do the arithmetic out loud — pre-verified):
MV = PQ. M = 550, V = 4 → PQ = 2,200; Q = 1,100 → P = 2. M rises 10% to 605 → new P = (605 × 4) ÷ 1,100 = 2.2 (10% inflation — long-run neutrality).
Comparative advantage. Northgate: 7 wheat or 3.5 cloth/day → opportunity cost of 1 cloth = 7/3.5 = 2 wheat. Southcastle: 9 wheat or 3 cloth/day → opportunity cost of 1 cloth = 9/3 = 3 wheat. Northgate's cost (2) < Southcastle's (3) → Northgate has the comparative advantage in cloth.
Exchange rates. $1 = 90 yen → $1 = 105 yen: the dollar has appreciated. A $20,000 U.S. car in the foreign market: 20,000 × 90 = 1,800,000 yen → 20,000 × 105 = 2,100,000 yen (pricier abroad → U.S. exports fall). (All pre-verified.)
The Final frame (last 5 min of the week):
- "The Final: 25 items, 100 points. Mix of MC, matching, multiple-answer, and true/false — all auto-gradable. Described-graph and curve-shift items (no freehand drawing). Coverage weighted toward the back half (Objectives 7–8 — money, banking, the Fed, the Phillips curve, and the open economy), since the midterm already tested Objectives 1–6.
- Items test the moves — compute a GDP, read a deflator, compute a CPI or unemployment rate, apply the rule of 70, shift the right curve, apply a multiplier, read the money market, trace the transmission chain, use the Phillips curve or MV = PQ, compute a comparative advantage, read an exchange-rate move.
- Your prep kit: Study Guide (do it first) → Exam-Prep Tutorial with your chatbot (submit the share link) → Practice Final (timed). Then sit the real Final. AI is not permitted on the Final.
- Biggest traps we've named all term: flipping the deflator formula, treating the CPI level as the inflation rate, multiplying instead of dividing in the rule of 70, shifting the wrong curve, confusing the multiplier with the money multiplier, treating a deficit as if it shrinks the debt, shifting money demand instead of moving along it, and treating the Phillips tradeoff as permanent. You've been catching those errors all term. One more time — you've got this."
Highest-cost misconception + cure:
- ❌ "The Phillips-curve tradeoff (lower unemployment, higher inflation) holds forever." → ✅ The tradeoff is short-run only. The long-run Phillips curve is vertical at the natural rate — there is no permanent menu to pick from.
- ❌ "Comparative advantage belongs to whoever produces more of the good." → ✅ That's absolute advantage. Comparative advantage belongs to whoever has the lower opportunity cost.
Segment 8 — Wrap: Schools of Thought & Closing (14 min) · Session 2 closes
Re-teach the schools of thought in plain language (evenhandedly — this is a synthesis, not a verdict). Keynesians argue that wages and prices are sticky in the short run, economies can sit in a recessionary gap for a long time without self-correcting quickly, and active fiscal/monetary stabilization can help close the gap. Classical/monetarist economists respond that prices adjust given enough time, that policy operates with long and variable lags (Friedman's critique, named factually) that can make active management counterproductive, and that steady rules (like a stated inflation target) beat discretionary fine-tuning. Agreed ground (not both-sided): the long-run Phillips curve is vertical; sustained high inflation is, in the long run, a monetary phenomenon; and the short-run/long-run distinction itself is accepted by both camps — they differ on how quickly the long run arrives and what to do while waiting for it.
One quick synthesis example (do it out loud — pre-verified):
A fictional economy has a recessionary gap and a debt/GDP ratio of 80%. Keynesians argue for expansionary fiscal policy to close the gap, worrying more about idle resources today than the debt ratio. Classical/monetarist economists respond that the high debt ratio raises the cost of new borrowing and that automatic stabilizers plus the Fed's tools may close the gap without new deficit spending. Both positions are presented at full strength here — this is a genuinely contested policy question, not a settled positive result.
Highest-cost misconception + cure:
- ❌ "One school is 'right' and the other is 'wrong.'" → ✅ The Keynesian/classical debate is a genuinely contested normative and empirical question about the speed of self-correction and the best tool to use — present both sides' strongest case; never hand down a verdict.
- ❌ "Quiz and exam items on the schools test which one is correct." → ✅ Contested-policy items test what each school claims, never which side is right.
Callback & close: "Sixteen weeks ago we started with one question — is the economy 'doing well'? — and everyone in the room reached for a different number. Now you have eight objectives' worth of tools to actually answer it: how to measure the economy, how it grows, how it swings, what two different institutions can do about it, how inflation and unemployment relate, and how it all connects to the rest of the world. That's the whole course. Go show it on the Final."
Quick-Reference: The Eight Review Moves (board summary)
| Objective | The Move | The Trap |
|---|---|---|
| 1 | Interior PPF point = idle resources, not unattainable; positive vs. normative | Confusing "attainable but inefficient" with "impossible" |
| 2 | GDP = C+I+G+NX; deflator = nominal/real × 100 | Flipping the deflator formula |
| 3 | CPI level ≠ inflation rate; u-rate = unemployed/labor force | Treating the CPI index number as the inflation rate |
| 4 | Growth % = (new−old)/old; rule of 70 = divide | Multiplying instead of dividing in the rule of 70 |
| 5 | Price-level change = movement along AD; input-cost shock = SRAS left | Shifting AD for a supply-side event |
| 6 | Multiplier = 1/(1−MPC); deficit (flow) ≠ debt (stock) | Confusing the deficit with the debt, or 1/(1-MPC) with 1/MPC |
| 7 | Money multiplier = 1/RR; rate change moves along Md, doesn't shift it | Mixing up the spending multiplier and the money multiplier |
| 8 | LR Phillips curve vertical; CA = lower opp-cost ratio | Treating the SR tradeoff as permanent |
~ Prof. Ashford's edition · Fall 2026 · built with thecoursemaker.com