：A game model of double benefit allocation is developed, and when the process of this game takes place n times,it s subgame perfect equilibrium-the benefit allocation ratios function at a time is worked out through the backward induction .

This paper analysis the incentive regime s effect on firms in oligopolistic markets with subgame perfect equilibrium method and points out that the firm owners can improve products efficiency and reinforce the markets competition, according to manager s recompense being a linear combination of profits and revenues in Sklivas s paper.

By means of converse induction, finally, a sub game perfect equilibrium is obtained, and the solution will provide the instruction for the nations to institute the trade policies and the industries to plan the developmental programming in the future.