This document provides an overview of the key differences between microeconomics and macroeconomics. Microeconomics studies small economic units like individual markets, firms, and consumers. It focuses on topics like supply and demand and price determination. Macroeconomics takes a broader view of the overall economy, examining aggregates like national income, output, unemployment, and inflation. It analyzes how fiscal and monetary policy impact economic growth and health at a national level. The document outlines the different units of analysis, tools, and central problems of microeconomics versus macroeconomics.