SHORT RUN: In terms of the macroeconomic analysis of the aggregate market, a period of time in which some prices, especially wages, are rigid, inflexible, or otherwise in the process of adjusting. Short-run wage and price rigidity prevents some markets, especially resources markets and most notably labor markets, from achieving equilibrium. In terms of the microeconomic analysis of production and supply, a period of time in which at least one input in the production process is variable and one is fixed. In the microeconomic analysis, the short run is primarily used to analyze production decisions for a firm. See also | fixed input | variable input | inflexible prices | short-run production | macroeconomics | microeconomics |