This document provides an overview and summary of key topics covered in a macroeconomics lecture and final exam, including: - The final exam will cover chapters 17-21 and topics like the government budget, taxes, deficits, debt, fiscal policy, and supply-side economics. - The government uses taxes and spending to achieve the objectives of low unemployment and low inflation. It collects income, social security, and other taxes and runs deficits when spending exceeds revenues. - Fiscal policy uses changes in government spending and taxes to expand or contract aggregate demand and output in the economy. However, crowding out and multipliers may reduce the impact of fiscal policy. - Supply-side policies like lower marginal