Arthur C.Pigou and Ronald H.Coase:A Comparative Study of Regulation Theories;

Pigovian tax and amount of exhausting restriction can help to internalize the external environment pollution,but it only effective when controlling pollution cost is lower than environment cost,and the effect of the amount of exhausting restriction is not so good as pigovian tax.

After analyzing the model of Pigovian tax under the guidance of game theory,according to the method of comparative analysis,compared the model of Pigovian tax,Cournot duopoly model and Stackelberg model with some scholars research achievements in 20th century.

Baced on the hypothesis of ration,economists claim to use pigovian tax and marketable pollution permits to protect the environment however,the application of humanistic theory is neglected.

In the market economy,though such measures as imposing Pigouvian tax can reduce the outside effect,the problem of environment pollution and ecology deterioration has never been solved radically.

This paper emphasizes the two main economic instruments of water resources management including Pigou means and Coase means and their classifications, and analyzes their applicability and feasibility.

By collecting Pigou tax, the exterior problems of the environmental pollution are solved to compensate the gap between the public cost and the private cost.

Based on the explanation of the theory of external economy of land,a series of exterior problems in the utilization of city land in our country were pointed out and from the four aspects of land use plan,levying "the Pigou tax", limiting property right and the economy droving mechanism,the countermeasure of the exterior problems was proposed.

Pigou s Pigou Tax and R.