Noun

Singular microeconomics

Plural uncountable

microeconomics (uncountable)

1. That field of economics that deals with the small-scale economic activities such as that of the individual or company.

Microeconomics (from Greek: μικρό-ς // small, little and οικονομία /ikono΄mia/ economy) is a branch of economics that studies how households and firms and some states make decisions to allocate limited resources, typically in markets where goods or services are being bought and sold. Microeconomics examines how these decisions and behaviours affect the supply and demand for goods and services, which determines prices; and how prices, in turn, determine the supply and demand of goods and services.

This is a contrast to macroeconomics, which involves the "sum total of economic activity, dealing with the issues of growth, inflation and unemployment, and with national economic policies relating to these issues". Macroeconomics also deals with the effects of government actions (such as changing taxation levels) on them. Particularly in the wake of the Lucas critique, much of modern macroeconomic theory has been built upon 'microfoundations' — i.e. based upon basic assumptions about micro-level behaviour.

One of the goals of microeconomics is to analyze market mechanisms that establish relative prices amongst goods and services and allocation of limited resources amongst many alternative uses. Microeconomics analyzes market failure, where markets fail to produce efficient results, as well as describing the theoretical conditions needed for perfect competition. Significant fields of study in microeconomics include general equilibrium, markets under asymmetric information, choice under uncertainty and economic applications of game theory. Also considered is the elasticity of products within the market system.