基于公共投资的内生增长:模型与政策

The Endogenous Growth based on Public Investment:Model and Policy

我国公共投资由各级政府部门主导,基于这一实践,文章在经典的拉姆齐-卡斯-库普曼斯模型的基础上,引入政府行政机构的最优化行为,说明在政府主导公共投资的增长方式下公共投资效率对经济增长和福利的影响。研究结果表明,存在一个公共投资效率的梯级,居民福利水平也呈现系列梯级分布,而且公共投资的生产效率梯级越高,居民福利水平梯级也越高。因此,在当前政府主导公共投资的增长方式下,采取有效措施提高公共投资的效率并使其位于关键值之上,这对于居民和政府机构是双赢的举措。

Since public investment is led by all levels of government in China,based on Ramsey-Cass-Koop-mans model,this paper introduces the optimizing behavior for government administrative,indicates that the efficiency of public investment have an affect on economic growth and welfare under the the government-led public invest-ment growth model. The result shows that the efficiency of public investment and the level of residents welfare ap-pear a gradient distribution and increase in direct proportion. Therefore,effective measures must be taken to improve the efficiency of public investment and it is vital importance,which means a win-win initiative for residents and government.