Macroeconomics vs Microeconomics Microeconomics is the study of how individual households and firms make decisions and how they interact with one another in markets Macroeconomics is the study of the economy as a whole. Its goal is to explain the economic changes that affect many households firms and markets at onceMacroeconomics vs. Microeconomics Microeconomics is the study of how individual households and firms make decisions and how they interact with one another in markets. Macroeconomics is the study of the economy as a whole. Its goal is to explain the economic changes that affect many households, firms, and markets at once