The term refers to actions undertaken by a state within a market economy that affect resource allocation, production, or consumption. These actions can take various forms, including price controls, subsidies, regulations, and taxes. For example, the implementation of a minimum wage law is a form of intervention aimed at influencing labor market outcomes.
Such involvement is often justified to correct market failures, such as externalities or information asymmetries, to promote social welfare, or to achieve macroeconomic stability. Historically, periods of economic crisis have often seen increased levels of state involvement. This involvement can lead to increased efficiency, greater equity, and enhanced economic growth, but also potentially to unintended consequences and reduced efficiency.