Integrity,Public Investment and Infrastructure Quality:Macro Performances and Micro Evidences
- 经济学院－已发表论文 
本文构建了廉洁度、公共投资影响基础设施质量的理论模型,而后分别利用我国省际相关数据和企业调查数据,实证检验了廉洁度、公共投资在基础设施质量提升中的宏观表现及微观影响。理论模型表明,廉洁度越低,企业越可能采取"以次充优"手段,导致基础设施质量越低;公共投资在廉洁度较高时有助于提高基础设施质量,而在廉洁度较低时,却会阻碍其发展。实证分析结果与理论模型基本相符,宏观结果表明:较低的廉洁度显著阻碍了基础设施质量的提高,而公共投资对基础设施质量的影响存在显著的廉洁度门槛效应,高廉洁度时公共投资的影响不显著,而低廉洁度时公共投资显著阻碍基础设施质量的提升;企业微观层面的证据支持上述结果,且进一步揭示了我国交通基础设施质量提升缓慢之谜。This paper constructs a theoretical model to analyze how integrity and public investment influence on the infrastructure quality, and then we use provincial related data and China enterprise survey data to show the macro performances and micro evidences that how integrity and public investment impact on infrastructure quality respectively.Theoretical model shows that,the lower the level of integrity,the more likely that enterprises take "shoddy"means,which results in the lower quality of infrastructure,and public investment can improve infrastructure quality when integrity level is high,while opposite when integrity is low. Empirical tests support the theoretical model. Macro results show that,the low integrity has significant negative impacts on the infrastructure quality,and public investment shows significant integrity threshold effects that when integrity level is high,its effects on road quality is not obvious,while it performances significant adverse effect when integrity level is low. The enterprise micro evidences support the above results,and it further reveals why the quality of transport infrastructure has been improving so slowly.