On the Practical Meaning of the Concept of Public Goods

萨缪尔森的公共产品概念定义了产品的两极,布坎南等人的后续研究补充了产品类型的中间段;公共产品概念的现实意义受到了质疑;公共产品本质观和对排他成本的重新认识,为政府提供某些产品提供了理论依据;对产品公共性纯度的认识有利于政府确认公共产品的受益对象。Samuelson describes two poplars of product when defining the concept of public goods.Other scholars like Buchanan later supplement the concept with an intermediate type.However,there is a general suspicion of the practical meaning of the concept of public goods.The idea of essence of public goods and rethinking of the cost of excluding provide theoretical foundation for the government to provide some goods.A good understanding of the purity degree of public goods is conducive to identifying the beneficiaries of the public goods by the government