Equilibrium

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Equilibrium

Equilibrium is a state of balance in an economy, and can be applied in a number of contexts. In elementary micro-economics, market equilibrium price is the price that equates demand and supply in a particular market. In this situation the market 'clears' at the equilibrium price - everything that is taken to market by producers is taken out of the market by consumers. This situation is commonly referred to as 'partial' equilibrium.

In introductory macro-economics, national income is in equilibrium when aggregate demand (AD) equals aggregate supply (AS). 

Disequilibrium occurs when a variable changes to create an excess of demand or supply, causing a 'movement' to a new equilibrium position. A sudden change is called an economic shock.

General equilibrium theory attempts to show how all markets move towards a co-ordinated equilibrum - this situation was first described by French 19th century economist Leon Walras.

Micro-economic equilibrium

equilibrium

Macro-economic equilibrium

national income equilibrium


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