一、引言城乡二元经济以及城乡公共品供给差距,是各国发展过程中具有普遍性的问题。发达国家一般是在市场作用下,经过漫长的自我演进,实现由二元经济向城乡一体 I. INTRODUCTION The dual economy of urban and rural areas and the gap between the supply of urban and rural public goods are issues of universal prevalence in the development of all countries. Developed countries are generally under the role of the market, after a long self-evolution, from the dual economy to urban-rural integration