Define macro economics.

Macroeconomics is a branch of economics that studies the aggregate economic activities of an economy as a whole. It focuses on large-scale economic phenomena such as:

• National income and output (e.g., GDP, GNP)
• Employment and unemployment (e.g., aggregate employment levels, unemployment rates)
• Price level and inflation (e.g., general price trends, cost-push vs. demand-pull inflation)
• Economic growth (e.g., long-term trends in GDP, per capita income)
• Government fiscal and monetary policies (e.g., taxation, budget deficits, interest rates)
• International trade and exchange rates (e.g., balance of payments, currency fluctuations)

Unlike microeconomics, which examines individual markets and decision-making units (e.g., households, firms), macroeconomics analyzes economic aggregates to understand overall economic performance, stability, and policy impacts. Key tools include aggregate demand-supply models, Keynesian theory, and monetary policy frameworks.