Economic equilibrium
In equilibrium values of economic variables will not change. For example, in the requirements text perfect competition, equilibrium occurs at the unit at which quantity demanded and quantity supplied are equal.
Market equilibrium in this issue is a assumption where the market price is establish through competition such(a) that a amount of goods or services sought by buyers is represent to the amount of goods or services gave by sellers. This price is often called the competitive price or market clearing price and will tend not to change unless demand or give changes, and quantity is called the "competitive quantity" or market clearing quantity. But the concept of equilibrium in economics also applies to imperfectly competitive markets, where it takes the cause of a Nash equilibrium.