Microeconomics studies individual economic decision-making units and specific markets, while macroeconomics analyzes the economy as a whole, including output, income, employment, inflation and trade. Microeconomics focuses on price determination and resource allocation, using supply and demand analysis. Macroeconomics examines macroeconomic variables such as GDP, unemployment and inflation, using tools like aggregate demand and supply. Microeconomics takes a bottom-up approach and macroeconomics a top-down one.