Study on the effect of environmental policies on resource allocation Study on the environmental policies in the U.S Study on the theory of environmental regulation Study on the index system of rational water resources allocation Research on the effect of environmental regulation on green development efficiency Research on the legal system of environment and resources allocation Pollution reduction effect of environmental aid to China and its policy implication Research on the effect of environmental regulation on green total factor productivity Study on the environmental effects of free trade 并列题名：Research on the effect of environmental regulation on green total factor productivity