# Macroeconomics — GDP, Inflation, the Cycle

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Category: Business
Slides: 13
Updated: 2026-05-17T20:56:02.402Z
Tags: catalog, business, macroeconomics

## Summary

A short field guide to the economy at the level of nations — output, prices, employment, money, and the long, uncertain arts of measuring and managing them. Key sections include: MACROECONOMICS GDP, Inflation, the Cycle; The four numbers that frame the conversation.; GDP, decomposed.; Expansion. Peak. Contraction. Trough. Repeat.; Inflation: too much money chasing too few goods.; Central banks: the (mostly) independent monetary authority.; Two goals. Often pulling in opposite directions.; Money: M1, M2 — and the great expansion since 2008.; Fiscal policy: spending, taxes, deficits.; Three traditions, one long argument..

## Slide Outline

1. MACROECONOMICS GDP, Inflation, the Cycle
2. The four numbers that frame the conversation.
3. GDP, decomposed.
4. Expansion. Peak. Contraction. Trough. Repeat.
5. Inflation: too much money chasing too few goods.
6. Central banks: the (mostly) independent monetary authority.
7. Two goals. Often pulling in opposite directions.
8. Money: M1, M2 — and the great expansion since 2008.
9. Fiscal policy: spending, taxes, deficits.
10. Three traditions, one long argument.
11. 2008 and 2020: different illnesses, different medicines.
12. Macroeconomics is humbling.
13. For further reading and watching.

## Slide Transcript

### Slide 1: MACROECONOMICS
GDP, Inflation, the Cycle

- Bulletin / Issue 01
- A short field guide to the economy at the level of nations — output, prices, employment, money, and the long, uncertain arts of measuring and managing them.
- DocumentBULL-2026-001
- Pages13
- ClassificationOPEN / EDUCATIONAL

### Slide 2: The four numbers that frame the conversation.

- Section 02 / The Aggregates
- Output · Jobs · Prices · External balance
- Macro is the study of economies in aggregate. Strip away the millions of transactions, and four headline numbers do most of the talking.
- GDP — Output
- $28.6T
- Total value of goods and services produced. The single biggest scoreboard. (US, 2024 est.)
- Unemployment
- 3.9%
- Share of the labor force without work and looking. Lagging and noisy, but politically loud.
- Inflation (CPI YoY)
- 3.2%
- Rate at which the general price level is rising. The central bank's primary obsession.
- Trade Balance
- -$773B
- Exports minus imports. Persistently negative for the US for half a century.
- Each number is a compromise. GDP misses unpaid labor and ecological harm. Unemployment misses the discouraged. CPI is a basket that only roughly resembles your basket. The trade balance pretends a nation is one big company. They are still the best summary we have.
- IndicatorTypeFrequencyLag
- GDPOutputQuarterly~30 days
- PayrollsLaborMonthly~5 days
- CPIPricesMonthly~10 days
- TradeExternalMonthly~40 days

### Slide 3: GDP, decomposed.

- Section 03 / National Accounts
- The expenditure identity — and what slips through
- Expenditure approach
- GDP=C+I+G+(X − M)
- C — Consumption
- ~68%
- Households buying things. Cars, rent, haircuts, streaming subscriptions. The dominant US driver.
- I — Investment
- ~18%
- Business capex, residential housing, inventories. Volatile; the cyclical engine.
- G — Government
- ~17%
- Federal, state, and local spending on goods and services. Excludes transfers.
- (X − M)
- ~-3%
- Net exports. Subtracts off the import bill. Persistently negative for the US.
- What GDP misses
- Unpaid labor. Childcare, eldercare, housework — economically vital, statistically invisible.
- Distribution. A country can grow while most people stagnate. GDP says nothing about who got it.
- Quality of life. Commute times, air quality, leisure, social trust — none counted.
- Environmental cost. A forest cut and sold adds to GDP; the missing forest does not subtract.
- Black markets & informal economies. Significant fractions in many countries.
- "Goal posts have been moved, leaving GDP a metric that explains less and less of what we actually care about."
- — Joseph Stiglitz, on alternatives to GDP
- GPIHDISPI
- Alternative metrics — Genuine Progress Indicator, Human Development Index, Social Progress Index — exist but none has dethroned GDP. We measure what we can.

### Slide 4: Expansion. Peak. Contraction. Trough. Repeat.

- Section 04 / The Cycle
- The business cycle has been observed since at least the 19th century
- Figure 4.1 — Idealized Business Cycle
- Output / time, with the four canonical phases
- Expansion
- Output rising, hiring, optimism, credit easy. Lasts on average 65 months in postwar US.
- Peak
- Capacity strained, wages bid up, inflation stirs, central bank tightens.
- Contraction
- Output falls, layoffs, defaults rise. NBER calls a "recession" in retrospect.
- Trough
- The bottom. Hiring resumes quietly. Stocks have usually already turned.

### Slide 5: Inflation: too much money chasing too few goods.

- Section 05 / Prices
- And the Phillips curve, which mostly held — until it didn't
- Inflation has two clean stories that rarely tell the whole truth on their own:
- Demand-pull. Spending outruns capacity. Hot economy, tight labor, price pressure builds.
- Cost-push. Supply shocks — oil, chips, ports — push input costs into final prices.
- Expectations. If everyone thinks 5% is normal, contracts and wages bake it in. Self-fulfilling.
- Monetary. "Always and everywhere a monetary phenomenon," argued Friedman. Print enough; eventually it shows up.
- The Phillips Curve — the original 1958 finding — claimed an inverse relationship between unemployment and inflation. The 1970s stagflation broke the simple version. We now use augmented versions with expectations baked in, but the relationship is unstable.
- Figure 5.1 — Phillips Curve, US
- Unemployment vs. inflation. Tidy in the 60s. Less so since.

### Slide 6: Central banks: the (mostly) independent monetary authority.

- Section 06 / Monetary Authority
- The most consequential job description nobody reads
- A central bank issues a country's currency, sets short-term interest rates, supervises banks, and acts as lender of last resort. In most modern economies it operates at arm's length from the elected government — controversial but, in most arguments, defensible.
- BankRegionFoundedMandatePolicy RateBalance Sheet
- Federal ReserveUnited States1913Dual: jobs + prices5.25%$7.4T
- European Central BankEurozone (20)1998Price stability ~2%3.75%€6.5T
- Bank of JapanJapan1882Price stability 2%0.50%¥760T
- Bank of EnglandUnited Kingdom1694Price stability 2% + financial stability5.00%£900B
- People's Bank of ChinaChina1948Currency, growth, stability (state-aligned)3.45%¥45T
- Their main tools
- Policy rate. The price of overnight money. Everything else is priced from this.
- Open-market operations. Buy or sell government bonds to expand or shrink the money supply.
- Reserve requirements. How much banks must hold against deposits. Largely zero in the US since 2020.
- Forward guidance. Talking. Sometimes the most powerful tool of all.
- "The Federal Reserve is independent within government, not of it." Independence is a political bargain. It survives as long as the bank avoids being seen as either a political actor or a passive technocrat — a narrow line.

### Slide 7: Two goals. Often pulling in opposite directions.

- Section 07 / Dual Mandate
- Federal Reserve Reform Act, 1977
- Maximum Employment
- Goal one
- Not zero unemployment — that's impossible. The target is the lowest rate consistent with stable prices, sometimes called NAIRU (non-accelerating inflation rate of unemployment), estimated around 4–5%.
- Tools: lower rates to stimulate hiring; QE to push money into risk assets and through the economy.
- Price Stability
- Goal two — formal target: 2% PCE
- Why 2% rather than 0? A small positive buffer gives room to cut rates in downturns and avoids the deflationary trap that haunted Japan for decades.
- Tools: raise rates, sell bonds, signal hawkishness — all of which slow demand and, hopefully, prices.
- The conflict. When inflation is high and unemployment is rising — the 1970s, briefly 2022 — the dual mandate forces a choice. Volcker chose prices in 1979–82; unemployment hit 10.8%. Most observers, eventually, called it the right call. None of them wanted to make it.

### Slide 8: Money: M1, M2 — and the great expansion since 2008.

- Section 08 / Money Supply
- QE made central-bank balance sheets a household phrase
- M1 — Narrow money
- $18.0T
- Currency in circulation + checking deposits + traveler's checks. The money you can spend right now.
- M2 — Broader
- $21.7T
- M1 + savings deposits + small time deposits + retail money funds. The most-watched aggregate.
- Fed Balance Sheet
- $7.4T
- Down from $9T peak (2022). Was $0.9T pre-2008. Eight times larger in fifteen years.
- Figure 8.1 — Fed Balance Sheet, 2003–2025 ($ trillions)
- Three rounds of QE, then QT. The line that scared a generation of monetarists.
- QE is buying long-duration bonds with newly created reserves; QT is letting those bonds mature without reinvestment. The mechanics are simple. The macro implications are still being argued.

### Slide 9: Fiscal policy: spending, taxes, deficits.

- Section 09 / The Other Lever
- Monetary's louder cousin — and the one with a vote
- Fiscal policy is what the legislature does. Two big knobs:
- Spending. Roads, defense, transfers, research. Goes directly into GDP via G — and indirectly via C.
- Taxes. Take less, leave more in private hands; take more, cool the economy down.
- Multipliers. A dollar of spending may yield $0.50 to $2 of GDP depending on slack, type of spending, and method of finance. Disputed in detail.
- Automatic stabilizers. Unemployment insurance and progressive taxes do counter-cyclical work without anybody voting on it.
- YearUS Deficit% of GDPDebt / GDP
- 2000+$236B+2.3%55%
- 2009−$1.4T−9.8%82%
- 2015−$438B−2.4%100%
- 2020−$3.1T−14.7%126%
- 2024−$1.8T−6.3%123%
- Persistent peacetime deficits at 5%+ of GDP are historically unusual. Debate over their consequences has been running for thirty years. Nobody has won it.
- Discretionary
- Voted on each year — defense, infrastructure, agencies. Visible, contested, slow.
- Mandatory / Entitlement
- Social Security, Medicare, Medicaid. Two-thirds of US federal outlays. Politically untouchable.
- Interest on Debt
- $890B in 2024 — now larger than the defense budget. Compounding mathematics, finally visible.

### Slide 10: Three traditions, one long argument.

- Section 10 / Schools of Thought
- Macro is a discipline whose questions outlast its answers
- Keynesian
- Keynes · Hansen · Samuelson · Krugman
- Markets clear slowly. Recessions are demand failures. Government should spend in the bust and save in the boom — what Keynes called "in the long run we are all dead."
- Won the 1930s–60s. Lost credibility in 1970s stagflation. Returned, in chastened form, after 2008.
- Monetarist
- Friedman · Schwartz · Lucas
- Money supply growth is the master variable. Steady, rule-based monetary policy beats discretion. Fiscal stimulus is mostly noise; central banks should target inflation and otherwise stay out of the way.
- Won the 1970s–90s. Strict version (M2 targeting) failed empirically, but inflation-targeting independent central banks won.
- MMT — Modern Monetary Theory
- Wray · Kelton · Mosler
- A government with monetary sovereignty cannot run out of its own currency. The real constraint is inflation and real resources, not bond markets. Spend until you hit capacity; tax to pull demand out when needed.
- Mostly heterodox. Got a hearing post-2020. Critics argue 2021–22 inflation was its real-world stress test, and it failed.
- What practitioners actually believe — most working macroeconomists are eclectic. They reach for Keynesian tools in slumps, monetarist discipline in inflations, and ignore MMT until somebody puts it on a campaign poster. Pure adherents are rarer than the textbooks suggest.

### Slide 11: 2008 and 2020: different illnesses, different medicines.

- Section 11 / Two Recent Crises
- Comparative anatomy of two modern recessions
- 2008 — Global Financial Crisis
- A balance-sheet recession
- Cause: Housing bubble + securitized subprime + leveraged interbank funding. Lehman fails Sept 15, 2008; credit freezes. Real economy follows.
- Response: Bailouts (TARP, $700B), Fed funds rate to 0–0.25%, QE1/2/3 expanding balance sheet from $0.9T to $4.5T, ARRA fiscal stimulus ($787B).
- Result: Slow grinding recovery. Unemployment took six years to return to pre-crisis levels. No inflation, contrary to monetarist warnings.
- 2020 — COVID Recession
- An exogenous shock
- Cause: Pandemic + voluntary and mandated shutdowns of activity. Not a financial crisis — a public health one with macro consequences.
- Response: Faster and bigger. Fed to zero in two weeks, balance sheet from $4T to $9T. CARES Act + follow-ons: ~$5T fiscal — checks, PPP, expanded UI, child tax credit.
- Result: V-shaped recovery — unemployment back to 4% in two years. Then a multi-year inflation spike (peak 9.1% CPI, 2022) that took until 2024 to tame.
- Metric2008 GFC2020 COVIDNote
- Peak unemployment10.0%14.7%Both severe; COVID was sharper, briefer.
- Time to pre-crisis jobs~76 mo.~24 mo.Recovery speed differed dramatically.
- Fiscal stimulus~$1.5T~$5.0T2020 ≈ 25% of GDP across all packages.
- Subsequent inflation peak2.7% (2011)9.1% (2022)The trade-off, in one row.

### Slide 12: Macroeconomics is humbling.

- Section 12 / The Honest Assessment
- A profession with mixed predictive record and good intentions
- If you've spent a few hours on the previous slides and feel slightly less certain than when you started — good. That's where most working macroeconomists are too.
- The 2008 crisis surprised most of the profession. Standard models had no banks. The IMF, in 2007, projected continued global growth.
- The 2021–22 inflation surprised most of the profession. "Transitory" was the consensus call. It was not transitory.
- Long-run growth is poorly understood. Why does productivity slow? Why did the post-1970s slowdown happen? Honest answer: we have hypotheses.
- Causation is brutal. No control group. No re-runs. "What if Volcker had hesitated" cannot be tested. We argue from a single tape.
- "It's much easier to write down a model in which deficits cause a crisis than to predict when, or whether, an actual crisis will occur." Macroeconomic prediction has accuracy in good times and humility in bad ones — and rarely the reverse.
- What the discipline does well
- Identifies trade-offs others ignore.
- Has a defensible vocabulary for policy debates.
- Most of the time, central banks now avoid the worst tail outcomes (1930s, 1970s).
- The useful posture: Treat macro forecasts as scenarios, not predictions. Distrust anyone — economist, pundit, podcaster — selling certainty. The economy is a complex adaptive system observed through noisy quarterly data, governed by feedback loops that include the very models we use to study it.

### Slide 13: For further reading and watching.

- Closing / References & Further Study
- An incomplete starter library
- Books & papers
- Keynes, J.M. The General Theory of Employment, Interest, and Money (1936).
- Friedman, M. & Schwartz, A. A Monetary History of the United States (1963).
- Mankiw, N.G. Macroeconomics. The standard textbook; readable.
- Blanchard, O. Macroeconomics. The other standard textbook.
- Reinhart, C. & Rogoff, K. This Time is Different (2009). Eight centuries of financial folly.
- Bernanke, B. The Courage to Act (2015). Insider account of the GFC response.
- Kelton, S. The Deficit Myth (2020). The MMT case, presented sympathetically.
- Tooze, A. Crashed (2018). The 2008 crisis as global political event.
- Sargent, T. "The Ends of Four Big Inflations" (1982). Expectations and credibility.
- Phillips, A.W. "The Relation Between Unemployment and the Rate of Change of Money Wage Rates" (1958).
- Video
- Macroeconomics, explained
- youtube.com/results?search_query=macroeconomics+explained
- Federal Reserve & monetary policy
- youtube.com/results?search_query=federal+reserve+monetary+policy
- Data sources
- FRED — Federal Reserve Bank of St. Louis. The single best free macro database.
- BEA — US Bureau of Economic Analysis. GDP and national accounts.
- BLS — Bureau of Labor Statistics. Jobs, prices, productivity.
- IMF WEO — World Economic Outlook. Comparable global data.
- — end of Bulletin No. 01 —


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