Microeconomics examines the economic behavior of agents (including individuals and firms) and their interactions through individual markets, given scarcity and government regulation.
Market structures, such as perfect competition and monopoly, are examined as to implications for behavior and economic efficiency. Analysis often proceeds from the simplifying assumption that behavior in other markets remains unchanged, that is, partial-equilibrium analysis. General-equilibrium theory allows for changes in different markets and aggregates across all markets, including their movements and interactions toward equilibrium