short run(redirected from short-run)
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short runan abstract time period within the THEORY OF SUPPLY in which some FACTOR INPUTS are fixed (FIXED FACTOR INPUTS like plant and machinery) and output can be adjusted only by changing the quantities of VARIABLE FACTOR INPUTS used (for example, raw materials, labour).
In practice, what is defined as the short run can vary greatly from industry to industry For example, in the petrochemical industry it can take five years or more to commission, build and run in a new plant so that any expansion of output within this term can be achieved only by increasing the throughput from existing plants. By contrast, in the fashion garment-making industry it may be possible to buy and install new sewing machines within a few weeks so that in this industry the short-run might be a month or less. Compare LONG RUN. See also RETURNS TO THE VARIABLE-FACTOR INPUT.