FOURTH RULE OF COMPETITION: The fourth of seven basic rules of the economy. It is the notion that competition among market buyers and sellers generate an efficient allocation of resources. Competition depends on the relative number of buyers and sellers. Fewer numbers give that side of the market relatively more market control and thus limits competition.

     See also | seven rules | market | competition | resource allocation | market control | monopoly | perfect competition | efficiency | competition among the many | competition among the few |

FOURTH RULE OF COMPETITION, AmosWEB GLOSS*arama, http://www.AmosWEB.com, AmosWEB LLC, 2000-2025. [Accessed: July 5, 2025].

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Disruptions of the equilibrium in the aggregate market (or AS-AD model) caused by shifts of the aggregate demand, short-run aggregate supply, or long-run aggregate supply curves. Shocks of the aggregate market are associated with, and thus used to analyze, assorted macroeconomic phenomena such as business cycles, unemployment, inflation, stabilization policies, and economic growth. The specific analysis of aggregate market shocks identifies changes in the price level (GDP price deflator) and real production (real GDP). Changes in the price level and real production have direct implications for the unemployment rate, the inflation rate, national income, and a host of other macroeconomic measures.

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