Tutorial

Economics

Understanding how the economy works and how it affects your life.

Tutorial·Difficulty: Intermediate·10 chapters·Updated Apr 19, 2026

Chapters

About this tutorial

Understanding how the economy works and how it affects your life.

Why Learn Economics

  • Make better financial decisions
  • Understand policy debates and vote informed
  • See through economic misinformation
  • Understand business and markets
  • Predict consequences of policies
  • Navigate career and investment decisions

Contents

ChapterTopic
01-fundamentalsSupply, demand, and market basics
02-macroeconomicsGDP, inflation, unemployment
03-microeconomicsIndividual and business decisions
04-money-bankingHow money and banking work
05-fiscal-policyGovernment spending and taxes
06-monetary-policyCentral banks and interest rates
07-internationalTrade, globalization, currencies
08-labor-marketsEmployment, wages, job markets
09-behavioralPsychology meets economics
10-practicalApplying economics to life

Core Concepts

Supply and Demand

The foundation of all economics:

ConceptMeaning
SupplyHow much producers will sell at each price
DemandHow much consumers will buy at each price
EquilibriumWhere supply meets demand
ShortageDemand exceeds supply (price too low)
SurplusSupply exceeds demand (price too high)

Price signals: Prices communicate information. High prices say "make more" or "use less." Low prices say "make less" or "use more."

Opportunity Cost

Every choice has a cost: what you give up.

  • Spending $50 = not having that $50 for something else
  • Time spent on X = time not spent on Y
  • Choosing career A = not having career B

Always ask: What am I giving up?

Incentives Matter

People respond to incentives:

TypeExample
FinancialHigher pay → more work
SocialStatus → certain behaviors
MoralRight thing → intrinsic motivation
NegativePenalties → avoiding behavior

Key insight: Predict behavior by looking at incentives, not intentions.

Trade-offs

There's no free lunch:

Trade-offExplanation
Efficiency vs. EqualityMore redistribution may reduce growth
Inflation vs. UnemploymentShort-term trade-off (Phillips curve)
Present vs. FutureConsume now or save for later
Risk vs. ReturnHigher returns require higher risk

Key Economic Indicators

What to Watch

IndicatorMeaningHealthy Range
GDP GrowthEconomy expanding or contracting2-3% annually
Inflation (CPI)Prices rising2% target
UnemploymentPeople seeking work4-5% "natural rate"
Interest RatesCost of borrowingVaries by conditions
Debt/GDP RatioGovernment debt burdenBelow 100% preferable

Economic Cycles

PhaseCharacteristicsTypical Duration
ExpansionGrowth, low unemployment, rising prices3-10 years
PeakMaximum activity, inflation concernsMonths
RecessionDeclining output, rising unemployment6-18 months
TroughBottom of cycle, before recoveryMonths

Recessions are normal. They've occurred roughly every 5-10 years throughout history.

Money and Banking

How Money Works

ConceptExplanation
Fiat moneyValue from government decree, not backing
Money supplyTotal money in circulation
Fractional reserveBanks lend most of deposits
Money creationLoans create new money

Federal Reserve Tools

ToolHow It WorksEffect
Interest ratesFed sets target rateLower = more borrowing, spending
Open market opsBuy/sell bondsInject/remove money from system
Reserve requirementsBanks must hold % of depositsHigher = less lending
Forward guidanceCommunicate intentionsShape expectations

Economic Systems

SystemKey FeaturesExamples
CapitalismPrivate ownership, markets, profit motiveUS, UK
SocialismPublic ownership, state planningCuba (partial)
Mixed economyPrivate + government interventionMost developed nations
Command economyCentral planningSoviet Union (historical)

Reality: Most economies are mixed. The question is where on the spectrum.

International Economics

Trade

Why trade: Specialization increases total output (comparative advantage).

ConceptMeaning
Comparative advantageProduce what you're relatively best at
TariffsTaxes on imports
Trade deficitImports > exports
Trade surplusExports > imports

Trade creates winners and losers within each country, even if net benefit is positive.

Exchange Rates

Stronger dollarWeaker dollar
Imports cheaperExports cheaper
Exports harder to sellImports more expensive
Travel abroad cheaperForeign tourists attracted

Common Economic Fallacies

FallacyReality
"Tariffs protect jobs"They protect some jobs, destroy others
"Trade deficits are bad"They reflect capital inflows
"Inflation helps debtors"Only unexpected inflation; harms savers
"Minimum wage is free money"Creates trade-offs in employment
"GDP = wellbeing"GDP measures output, not quality of life
"Zero-sum thinking"Trade/growth can be positive-sum

Economics in Daily Life

Personal Decisions

DecisionEconomic Thinking
Career choiceCompare lifetime earnings, opportunity cost
Buy vs. rentCalculate total costs, flexibility value
EducationROI varies by field and institution
SavingTime value of money, compound growth

Understanding News

When you hear economic news, ask:

  • Who benefits? Who loses?
  • What are the trade-offs?
  • What are the second-order effects?
  • What incentives does this create?

Economic Schools of Thought

SchoolCore BeliefPolicy Preference
KeynesianDemand-driven; government should stabilizeActive fiscal policy
MonetaristMoney supply is keyStable monetary policy
AustrianMarkets self-correct; interventions backfireMinimal intervention
Supply-sideIncentives drive growthLow taxes, deregulation
MMTSovereign governments can print without constraintAggressive spending

Reality: Each has insights; none is complete.

Books

BookAuthorLevel
Economics in One LessonHenry HazlittBeginner
Basic EconomicsThomas SowellBeginner
Naked EconomicsCharles WheelanBeginner
The Undercover EconomistTim HarfordBeginner
Principles of EconomicsMankiwTextbook

Following Economics

  • The Economist (magazine)
  • Financial Times
  • Planet Money (podcast)
  • Marginal Revolution (blog)
  • FRED (data)

Key Takeaways

  1. Incentives drive behavior - Follow the incentives to predict outcomes
  2. Everything has a cost - Opportunity cost is real even when invisible
  3. Trade-offs are unavoidable - There's no policy with only benefits
  4. Markets work (mostly) - But can fail; government helps and hurts
  5. Unintended consequences - Every policy has effects beyond intention
  6. Thinking on the margin - Decisions are about next unit, not all-or-nothing
  7. Long-run vs. short-run - Effects differ over time horizons