PPP项目中合同柔性对项目价值增值的影响研究

Effects of Contractual Flexibility on Project Value-Added in PPP Projects

为探求合同柔性对PPP项目价值增值的影响,基于不完全契约理论与社会交换理论,构建合同柔性、私人部门公平感知与PPP项目价值增值间关系的理论模型,通过问卷调查获得234份有效数据,采用结构方程和Bootstrap分析方法进行实证检验。研究发现:合同条款柔性与合同执行柔性均对PPP项目价值增值具有显著正向影响,且私人部门公平感知的3个维度均对PPP项目价值增值具有显著正向影响;私人部门公平感知在合同柔性与PPP项目价值增值关系中扮演着中介角色,且互动公平与分配公平的中介效应较大,程序公平的中介效应最小。

In order to explore the impact of contractual flexibility on project value adding in PPP projects.Based on incomplete contract theory and social exchange theory,a conceptual model including contractual flexibility,justice perception of private sector and PPP project value adding was constructed.Through a questionnaire survey,234 valid data were obtained,and structural equation and Bootstrap methods were used for empirical test.The results showed that both the flexibility of contract terms and contract execution had significant positive effects on the value adding of PPP projects,and the three dimensions of private sector’s justice perception had the same effects.Justice perception of private sector significantly mediated the relationship between contractual flexibility and PPP project value-added,and the mediating effects of interactive justice and distributive justice were larger,and the one of procedural justice was the smallest.