庇古与科斯的规制理论比较

庇古和科斯的规制理论在观点上有着明显的冲突.庇古认为,由于外部性等原因,部分产品的边际私人纯产值与边际社会纯产值并不相等,因此政府必须界入进行管制,对外部性产品收取庇古税;科斯则认为,产权不清才是外部性成本的原因,由此提出了只要明确产权市场就能良好运行的科斯定理.科斯在庇古的基础上拓展了外部性规制理论,但"科斯定理"并不能超越和替代"庇古税".

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

The regulation theories of Arthur C. Pigou and Ronald H. Coase are in direct conflict. Pigou argues that marginal private net product does not equal marginal private net product for some goods owing to externality. Therefore , governments should interfere and levy a Pigovian tax. In contrast , Coase holds that unclear property rights are the fundamental reason for externality and proposes the Coase theorem that well-defined property rights could overcome the problems of externalities. Coase has expanded the theory of externality regulation on the basis of Pigou , but the Coase theorem cannot surpass and substitute the Pigovian tax.