An object is placed at the principal focus of a concave

Concept of 'Consumer's Surplus' was evolved by

The reasons for L-shaped long run average cost curve is/are

Pricing decision includes

When price elasticity of demand is unity, the total expenditure:

A rightward shift in supply curve indicates

Movement along a demand curve as a result of change in price is known as 

Market with one buyer and one seller is called

In case of Giffens goods, price effect is

When AR is constant, MR is

Under perfect competition, the long-run equilibrium of the firm is established at