Ch10. Applied Economics Review — Mastering Economic Indicators and Current Economic Affairs

Compressed Review of Series Core Concepts

Microeconomics (Ch1–3)

Supply & Demand: Price rises → demand falls, supply rises. Markets clear at the equilibrium price.

Elasticity:

Price elasticity: % change in quantity demanded for a 1% change in price
Elastic (>1): luxury goods, goods with many substitutes
Inelastic (<1): necessities, addictive goods

Consumer Theory: Law of diminishing marginal utility. Indifference curves + budget line → consumer equilibrium (MRS = Px/Py).

Producer Theory: MC = MR profit maximization. Perfect competition yields zero economic profit in the long run.

Market Structure: Perfect competition → Monopolistic competition → Oligopoly → Monopoly (increasing market concentration)

Macroeconomics (Ch4–6)

GDP: Y = C + I + G + NX. Nominal vs. real (adjust with the GDP deflator).

Inflation:

Demand-pull: AD increases → prices rise
Cost-push: AS decreases → prices rise + GDP falls (stagflation)

Four types of unemployment: Frictional, structural, seasonal, cyclical. Natural rate = frictional + structural.

Fiscal and Monetary Policy:

Fiscal: G ↑ → AD ↑ (multiplier effect), crowding out (interest rate rise) possible
Monetary: Fed funds rate ↓ → money supply ↑ → consumption and investment rise

IS-LM: IS downward-sloping (interest rate ↑ → investment ↓), LM upward-sloping (income ↑ → money demand ↑ → interest rate ↑)

Growth and Trade (Ch7–8)

Solow Model: Long-run growth source = technological progress. Capital accumulation alone has limits.

Endogenous Growth: R&D and human capital explain technological progress from within the model.

Comparative Advantage: Both countries gain when each specializes in what they produce at relatively lower opportunity cost.

Exchange Rates: Weaker domestic currency → export price competitiveness ↑, import prices ↑.

AD-AS (Ch8): AD downward-sloping, SRAS upward-sloping, LRAS vertical. Supply shocks → stagflation.

Behavioral Economics (Ch9)

System 1 vs. 2: Intuitive/fast vs. analytical/slow thinking.

Loss Aversion: Pain of loss ≈ joy of gain × 2.

Nudge: Better decisions through choice architecture design. Default effect, social norms.

Reading Economic Indicators

GDP Growth Rate

Quarterly GDP growth rate. Reported relative to the prior quarter (seasonally adjusted annualized rate, SAAR) or year-over-year.

Two or more consecutive quarters positive: economic expansion
Negative for two consecutive quarters: technical recession

The BEA (Bureau of Economic Analysis) publishes US GDP data.

Consumer Price Index (CPI)

Tracks the average price change of goods and services purchased by households. The primary inflation gauge.

Published monthly by the Bureau of Labor Statistics (BLS). The Fed targets 2% annual PCE inflation.

Core inflation: Excludes food and energy. Reveals underlying inflation trends.

Unemployment Rate

Number of unemployed as a percentage of the labor force. Does not include discouraged workers (those who have stopped looking) → may understate labor market slack.

Employment-Population Ratio: More comprehensive — employed persons as a share of the working-age population (16+).

The BLS releases the jobs report on the first Friday of each month.

The Fed Funds Rate

The Federal Open Market Committee (FOMC) meets eight times per year to set the federal funds rate — the economy’s “vital signs.”

Rate hike: curbs inflation, cools overheating
Rate cut: stimulates the economy, tolerates some price pressure

“CPI rises 3.5% year-over-year” → goods and services are on average 3.5% more expensive than a year ago. When inflation rises → the Fed is more likely to raise rates → mortgage and loan rates increase.

Interpreting Exchange Rate News

“Dollar strengthens to 1.10 USD/EUR” → the dollar buys more euros = dollar appreciation. Strong dollar: importers and US consumers benefit; US exporters face headwinds; overseas travel becomes cheaper.

Interpreting Interest Rate News

“Fed holds rates steady” → signals the FOMC sees current conditions as balanced. Watch for forward guidance in the Fed’s statement.

A large gap between US and foreign rates can drive capital flows and currency movements.

Interpreting Household Debt News

High household debt-to-GDP ratio → when rates rise, debt service burden increases → consumer spending falls → domestic demand weakens.

The Fed and FDIC monitor consumer leverage closely.

Connecting Economics to Everyday Life

“What is the role of public enterprises during a recession?” → Keynesian fiscal multiplier: expanding public investment and maintaining employment acts as a stabilizer, supporting AD.

“What are the effects of inflation on lower-income households?” → Inflation erodes real wages, reduces the real value of savings, and hits those on fixed incomes (retirees, Social Security recipients) hardest.

“Why can’t a weaker dollar always be seen as good for exporters?” → Rising import costs for raw materials and energy increase production costs, partially offsetting export gains. Terms of trade also deteriorate.

Key Formula Reference

Formula	Content
Price Elasticity	% Change in Qty Demanded / % Change in Price
GDP Deflator	Nominal GDP / Real GDP × 100
Money Multiplier	1 / Reserve Ratio
Fiscal Multiplier	1 / (1−MPC)
Break-even Point	Fixed Costs / (Unit Price − Variable Cost)
Golden Rule Capital	MPK = Depreciation rate + Population growth rate
Fisher Equation	Nominal rate = Real rate + Expected inflation

Learning Checklist

Explain the core concepts of supply, demand, and elasticity
Interpret GDP, CPI, and unemployment figures
Explain fiscal and monetary policy effects in the IS-LM model
Apply the nudge principle in a policy context
Interpret economic news (exchange rates, interest rates, inflation) in real-world terms

Key Concept Cards

Discretionary Fiscal Policy vs. Automatic Stabilizers ★★★★ : Discretionary: deliberate changes in spending or taxes (subject to lags). Automatic stabilizers: work automatically with the business cycle. Recession → tax revenue ↓, unemployment benefits ↑ → support aggregate demand. Boom → tax revenue ↑, unemployment benefits ↓ → restrain aggregate demand. Examples: progressive income tax, unemployment insurance.

Ricardian Equivalence ★★★ : When the government borrows to spend, rational consumers anticipate higher future taxes and save more today → consumption unchanged → fiscal policy ineffective. Counterarguments: liquidity constraints, intergenerational transfers, the reality of myopic behavior.

Practice Quiz

Q. How do automatic stabilizers moderate the business cycle? Give an example.

During a recession: income falls → progressive tax revenue falls → cushions decline in disposable income + unemployment benefits rise → supports consumption. During a boom: income rises → tax revenue rises → restrains aggregate demand. Operates automatically without separate policy decisions.