शुद्ध वाक्य की पहचान

If the firms under perfect competition have different costs, abnormal profits can be earned in the long run only by

A firm maximizes its profit when

Concept of 'Consumer's Surplus' was evolved by

The goods whose demand is not tied with the demand for some other goods are said to have 

The above curve is a

Diamond-water paradox establishes the fact that

A rightward shift in supply curve indicates

The positive cross elasticity of demand between two products means the two products

Economics of scale means

Market demand for any good is a function of the