April 2, 2026 • Global

Recession, Inflation, or Both? The 15-Minute Cheat Sheet to Understanding Why Everything Is So Expensive

A crash course in Macroeconomics 101 covers the study of the economy as a whole, contrasting with microeconomics. It explains the three major goals (economic growth measured by GDP, low unemployment, and stable prices), key indicators (GDP, inflation with CPI, demand-pull and cost-push inflation, unemployment types including frictional, structural, and cyclical), the business cycle (expansion, peak, contraction/recession, trough), fiscal policy (government spending and taxation with expansionary and contractionary actions), monetary policy (central bank tools: open market operations, discount rate, reserve requirements), the AD/AS model (aggregate demand, short-run aggregate supply, long-run aggregate supply, Phillips Curve trade-off), and the financial system (functions of money, fractional reserve banking, money multiplier).
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GDP
Gross Domestic Product
Total market value of all final goods and services produced within a country in a given period. Primary measure of economic size and health. Two types: Nominal GDP (current prices) and Real GDP (adjusted for inflation).
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C + I + G + (X-M)
Expenditure Approach to GDP
GDP = C (Consumption/household spending) + I (Investment/business spending on capital) + G (Government Spending) + (X-M) (Net Exports = Exports minus Imports).
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Inflation
Inflation Rate
Rate at which the general level of prices for goods and services is rising. Types: Demand-Pull ('too much money chasing too few goods') and Cost-Push (prices rise due to increased input costs).
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CPI
Consumer Price Index
The most common measure of inflation, tracking a basket of household goods.
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Unemployment Types
Frictional, Structural, Cyclical
Frictional: short-term, people moving between jobs. Structural: mismatch between workers' skills and available jobs (e.g., automation). Cyclical: caused by recession or downturn.
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Business Cycle
Four Phases
1. Expansion (positive growth, GDP rises, unemployment falls). 2. Peak (maximum output). 3. Contraction/Recession (GDP declines for two consecutive quarters, unemployment rises). 4. Trough (bottom, followed by recovery).
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Fiscal Policy
Government Spending & Taxation
Expansionary (during recessions: increase spending or cut taxes to boost Aggregate Demand; risk: higher debt and inflation). Contractionary (when overheating: cut spending or raise taxes to cool economy).
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Monetary Policy
Central Bank Tools
1. Open Market Operations (OMO): buying bonds puts money in → lowers rates; selling bonds takes money out → raises rates. 2. Discount Rate: interest rate central bank charges commercial banks. 3. Reserve Requirements: cash banks must hold; lowering allows more lending.
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AD/AS Model
Aggregate Demand / Aggregate Supply
AD slopes downward (C+I+G+X-M). SRAS slopes upward. LRAS is vertical (potential output at full employment, determined by resources and technology).
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Phillips Curve
Inflation-Unemployment Trade-off
In the short run, stimulating the economy (shifting AD right) lowers unemployment but raises inflation. Slowing the economy lowers inflation but raises unemployment.
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Money Functions
Medium of Exchange, Unit of Account, Store of Value
The three functions of money in an economy.
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Fractional Reserve Banking
Fractional Reserve Banking
Banks only keep a fraction of deposits on hand; they lend out the rest, which creates money in the economy.
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Money Multiplier
Money Multiplier Formula
Multiplier = 1 / Reserve Ratio. The amount of money generated by each dollar of reserves.
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The Three Major Goals of Macroeconomic Policy

  • Economic Growth: Increase total output of goods and services (measured by GDP).
  • Low Unemployment: Ensure most people who want a job can find one.
  • Stable Prices: Keep inflation low and predictable so money holds its value.
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Key Concepts & Indicators

  • GDP (Gross Domestic Product): Total market value of all final goods/services produced within a country. Nominal GDP = current prices; Real GDP = adjusted for inflation (true growth measure).
  • Three ways to calculate GDP (all equal): Expenditure Approach (C+I+G+(X-M)), plus two others not detailed.
  • Inflation: Demand-Pull (too much demand) and Cost-Push (input costs rise). Measured by CPI (Consumer Price Index).
  • Unemployment: To be counted, must be actively seeking work. Three types: Frictional, Structural, Cyclical.
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The Business Cycle

  • Expansion: Positive growth, GDP rises, unemployment falls.
  • Peak: Economy hits maximum output.
  • Contraction (Recession): GDP declines for two consecutive quarters, unemployment rises.
  • Trough: Bottom of the cycle, followed by recovery.
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Fiscal Policy (The Government)

  • Expansionary Fiscal Policy: Used during recessions. Actions: Increase government spending (e.g., infrastructure) or cut taxes. Goal: Boost Aggregate Demand (AD). Risks: Higher government debt and inflation.
  • Contractionary Fiscal Policy: Used when economy is overheating (high inflation). Actions: Cut government spending or raise taxes. Goal: Cool down economy to stabilize prices.
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Monetary Policy (The Central Bank—The Fed in the US)

  • Open Market Operations (OMO): Buying bonds puts money into banking system → lowers interest rates → stimulates economy. Selling bonds takes money out → raises interest rates → slows inflation.
  • Discount Rate: Interest rate central bank charges commercial banks for loans. Lower rates encourage borrowing; higher rates discourage it.
  • Reserve Requirements: Amount of cash banks must hold in reserve. Lowering this allows banks to lend more (increasing money supply).
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The Aggregate Demand / Aggregate Supply (AD/AS) Model

  • Aggregate Demand (AD): Total demand for all goods/services. Slopes downward. Made of C + I + G + (X-M).
  • Short-Run Aggregate Supply (SRAS): Total production of all firms. Slopes upward.
  • Long-Run Aggregate Supply (LRAS): Economy's potential output (full employment). Vertical because output determined by resources (land, labor, capital) and technology, not price level.
  • The Phillips Curve Trade-off: In short run, stimulating economy (shifting AD right) lowers unemployment but raises inflation. Slowing economy lowers inflation but raises unemployment.
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Money and the Financial System

  • Money serves three functions: medium of exchange, unit of account, store of value.
  • Fractional Reserve Banking: Banks keep only a fraction of deposits on hand; lend out the rest. This creates money.
  • Money Multiplier: Multiplier = 1 / Reserve Ratio. Amount of money generated by each dollar of reserves.
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Summary: The Big Picture

  • Macroeconomics is the study of how to manage the trade-off between growth and inflation.
  • When recession hits (low GDP, high unemployment): Government cuts taxes and spends more; Central Bank cuts interest rates and buys bonds.
  • When inflation is too high (economy overheating): Government raises taxes and cuts spending; Central Bank raises interest rates and sells bonds.

KEY QUOTES

Macroeconomics is the study of the economy as a whole—growth, inflation, unemployment, and how governments and central banks try to manage it all.
Unlike microeconomics, which looks at individual consumers and firms, macroeconomics looks at the big picture.
The three major goals: Economic Growth (GDP), Low Unemployment, and Stable Prices (low inflation).
Nominal GDP is measured in current prices; Real GDP is adjusted for inflation (this is the true measure of growth).
There are three ways to calculate GDP, which should all equal the same number.
Demand-Pull Inflation: 'Too much money chasing too few goods.' Cost-Push Inflation: Prices rise due to increase in cost of inputs.
To be unemployed, you must be actively seeking work.
Economies do not grow smoothly; they move in cycles: Expansion, Peak, Contraction (Recession), Trough.
A recession is defined as GDP declining for two consecutive quarters.
Expansionary fiscal policy: Increase government spending or cut taxes to boost Aggregate Demand. Risk: higher government debt and inflation.
Contractionary fiscal policy: Cut government spending or raise taxes to cool down the economy.
Open Market Operations (OMO): Buying bonds puts money into the banking system; selling bonds takes money out.
The Discount Rate is the interest rate the central bank charges commercial banks for loans.
The Long-Run Aggregate Supply (LRAS) is vertical because, in the long run, output is determined by resources and technology, not by price level.
In the short run, policymakers face a trade-off between inflation and unemployment (the Phillips Curve).
Fractional reserve banking: Banks only keep a fraction of deposits on hand; they lend out the rest. This creates money in the economy.
The Money Multiplier = 1 / Reserve Ratio.
macroeconomics GDP gross domestic product nominal GDP real GDP expenditure approach consumption investment government spending net exports inflation demand-pull inflation cost-push inflation CPI consumer price index unemployment frictional unemployment structural unemployment cyclical unemployment business cycle expansion peak contraction recession trough fiscal policy expansionary fiscal policy contractionary fiscal policy government spending taxation aggregate demand monetary policy central bank Fed open market operations OMO discount rate reserve requirements money supply interest rates AD/AS model aggregate demand short-run aggregate supply long-run aggregate supply Phillips Curve money medium of exchange unit of account store of value fractional reserve banking money multiplier economic growth price stability

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