Abstract
The game theory was utilized and one-stage game model and repeated game model were constructed. The models' results show that powered by the economy benefit, the supplier will supply non-green raw material in one-stage game. As a result, the low efficient equilibrium is realized. In order to improve the efficiency of equilibrium, it is feasible to transfer one-stage game into repeated games. The long-term economy benefit will restrict the supplier's opportunistic behavior in repeated games. As long as the discount factor can satisfy some condition, the supplier will conform its promise to supply green raw material, and the win-win of economy and environment protection will be realized.
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