20世纪 90年代 ,日本为对付泡沫经济崩溃后的长期衰退 ,多次实施了以公共投资为主体的大型和超大型的经济景气对策 ,然而 ,经济仍然不能摆脱萧条的缠绕 ,并不时出现负增长 ,使得公共投资陷入了困境。这不但是日本迫切需要解决的问题 ,而且为其他国家所关注 ,特别是对正饱受危机 In the 1990s, against the long-term recession following the collapse of the bubble economy, Japan implemented many large-scale and super-large economic measures with public investment as the mainstay. However, the economy still can not get out of the recession and negatively grows from time to time, Making public investment in trouble. This is not only an issue urgently needed to be solved by Japan, but also a concern for other countries, especially for the crisis