政府公共支出与经济增长的关系一直是理论界研究的重点。新古典增长理论认为,政府从长期来看对经济增长不起作用,只在短期影响经济增长。这一结论已不能与经验研究相一致。内生增长理论认为,由于知识、基础设施等公共物品具有外部性,政府须干预市场,政府对私人投资的补充对经济 The relationship between government public expenditure and economic growth has always been the focus of theoretical research. Neoclassical growth theory holds that the government will not play a role in economic growth in the long run and will only affect economic growth in the short run. This conclusion can no longer be consistent with the empirical study. Endogenous growth theory that, due to knowledge, infrastructure and other public goods have externalities, the government must intervene in the market, the government’s private investment to the economy