Definition and meaning of the Lerner index, a measure of monopoly power in economics.
A measure of market power on the demand side of a market, indicating the proportion of total market purchases by the largest buyers.
The process of determining the firms, consumers, and products which constitute a specific market; a fundamental step in competition policy.
The ability of an economic agent to affect the equilibrium price in a market.
Profit in excess of normal profit earned by a firm that is able to exploit monopoly power.
