Abstract：
Based on the neoclassical economics analysis framework, the paper extends the basic market power concept “Lerner index” which applies to monopoly industry. By introduced a basic concept “Oligopolistic Power” which can be measured market power of imperfect competition industry, the paper explores its influencing factors theoretically and empirically. Theoretical analysis shows the oligopolistic power value of imperfect competition industry equals to product of conjectural elasticity and inverse demand-price elasticity. By aggregating oligopolistic power from firm lever to industry lever which provides a foundation for empirical estimation, the paper estimates oligopolistic power of several China's industries and tests conclusions of theoretical research. About anti-monopoly enforcement there has argument between Harvard school's structuralism and Chicago school's behaviorism, however our research shows that both of them only catches one side of oligopoly market. In the anti-monopoly law enforcement structuralism and behaviorism should be combined organically.
2015 
