一在一定意义上,政府是一种提供公共物品的制度安排。然而,公共性是一个连续的区间,公共物品与私人物品间并不存在泾渭分明的边界。无论怎样定义公共物品,政府的活动范围都始终存在合理争论的区域。而且,公共物品的边界不仅不是明晰的,也不是固定不变的。不同的国家或同一国家的不同时期,其边界是不同的,并且总的趋势是,公共物品的边界在“物品序列”里会 In a certain sense, the government is a system of arrangements for providing public goods. However, publicity is a continuous interval, and there is no clear distinction between public goods and private goods. No matter how the definition of public goods, the government’s scope of activities there is always a reasonable argument in the area. Moreover, the boundaries of public goods are neither clear nor permanent. The boundaries are different for different countries or for different periods in the same country, and the general trend is that the boundaries of public goods will be in the “sequence of goods”