一、引言财政支出增加是否有利于经济增长,一直是国际学术界争论的一个热点问题。尤其是在广大发展中国家,政府公共支出占GDP的比重平均为26%,在过去15年间上升了大约8个百分点。但是与此同时, I. Introduction Whether the increase in fiscal expenditure is conducive to economic growth has always been a hot issue in the international academic debate. Especially in the vast majority of developing countries, public expenditure on government accounts for an average of 26% of GDP, an increase of about 8 percentage points over the past 15 years. But at the same time,