Economics

The AD-AS model explains how the overall price level and total output are determined, how demand shocks and supply shocks cause recessions and inflation, and how the economy self-corrects over time.

Learn what the Phillips curve is, the expectations-augmented equation, the inflation-unemployment trade-off, the sacrifice ratio, why the curve broke down in the 1970s, and how the Volcker disinflation reshaped monetary policy.

The production possibilities frontier (PPF) shows the maximum combinations of two goods an economy can produce. Learn how to read the graph, calculate opportunity cost, and understand what shifts the PPF.

Opportunity cost is the value of the best alternative you forgo when making a decision. Learn the definition, formula, explicit vs implicit costs, and real-world examples.

Learn how price elasticity of demand measures consumer responsiveness to price changes, including the midpoint method, determinants of elasticity, and the total revenue test.

The money supply is one of the most important concepts in macroeconomics. It determines how much purchasing power flows through an economy, shapes the effectiveness of monetary policy, and plays a central role in inflation. Much of the money in your bank account exists because a bank made a loan — understanding how that process […]

Learn the three types of unemployment — frictional, structural, and cyclical — plus the natural rate, NAIRU, efficiency wages, and what determines long-run unemployment.

Economic growth is the single most important factor determining living standards across countries and over time. Why are some nations wealthy while others remain poor? The answer lies in long-run economic growth in real GDP per capita — sustained increases in the value of goods and services an economy produces per person. For investors, growth […]

Supply and demand is the foundational economic model explaining how prices are set, how markets reach equilibrium, and what causes surpluses and shortages.

Gross domestic product (GDP) is the total market value of all final goods and services produced within a country. Learn the GDP formula, components, measurement approaches, and limitations.