Introduction toMacroeconomics

Economics begins with scarcity: resources are limited and every choice involves a trade-off. This chapter introduces the economic way of thinking — opportunity cost, marginal analysis, and the production possibilities model — as the foundation for all that follows.

Supply and demand is the core model of market economics. This chapter examines what drives buyers and sellers, how markets reach equilibrium, and what happens when either curve shifts due to changes in income, prices of related goods, or expectations.

Macroeconomics studies the economy as a whole. This chapter introduces the key questions macroeconomists ask — about output, employment, and price levels — and previews the models used to answer them, including the role of expectations and economic shocks.

Before we can analyze the economy, we need to measure it. This chapter covers GDP — what it includes and excludes, how it is calculated, and how related measures like national income and disposable income connect to economic well-being.

Why are some countries rich and others poor? This chapter examines the sources of long-run economic growth — capital accumulation, technological change, and productivity — and evaluates policies designed to raise a nation's standard of living over time.

Economies expand and contract in recurring patterns called business cycles. This chapter examines the phases of the cycle, how unemployment is measured and categorized, and the causes and consequences of inflation and deflation.

This chapter builds the behavioral foundations of the macroeconomic model — how households decide to consume and save, how investment responds to interest rates, and how the multiplier amplifies initial spending changes throughout the economy.

The AD-AS model is the central framework of macroeconomics. This chapter develops the aggregate demand and aggregate supply curves, explains what shifts them, and uses the model to analyze changes in output and the price level.

This chapter deepens the aggregate supply analysis by distinguishing short-run from long-run supply, examining the relationship between inflation and unemployment via the Phillips curve, and exploring how supply-side shocks complicate policy.

Fiscal policy uses government spending and taxation to stabilize the economy. This chapter examines expansionary and contractionary fiscal tools, automatic stabilizers, budget deficits and surpluses, and the long-run implications of accumulated national debt.

Money is more than currency. This chapter examines what money is and how it is created through the banking system, the structure and tools of the Federal Reserve, and how the money supply affects interest rates in the short run.

How does the Fed's control over interest rates translate into changes in real GDP and prices? This chapter traces the monetary transmission mechanism, evaluates the effectiveness of monetary policy, and compares it with fiscal policy in different economic conditions.

Trade allows nations to specialize and consume beyond their production possibilities. This chapter develops the theory of comparative advantage, examines the gains from trade, and evaluates trade barriers — tariffs, quotas, and subsidies — and the political economy around them.

Every nation tracks its international transactions through the balance of payments. This chapter explains how exchange rates are determined, how currency appreciation and depreciation affect trade flows, and what persistent trade deficits mean for the domestic economy.