中文摘要：

从全新的纵贯历史研究维度，突破静态的人口统计学视角，进一步结合团队互动特征提出重大工程高管团队演化对项目绩效影响的理论假设。通过对南宁火车东站基础设施项目22个月的追踪研究发现：团队互动特征对于项目绩效的影响程度明显强于人口统计学特征。在与年龄和专业背景有关的人口统计学特征中，仅有专业背景异质性与项目绩效高度正相关。而在团队互动特征中，高管团队内部信息交换和高管团队氛围均与项目绩效高度正相关，而中层与高管团队信息交换以及中层与高管团队相互影响则分别与项目绩效中度正相关和高度负相关。研究结论在丰富高阶梯队理论的同时．也为中国在PPP模式引领下不断涌现的重大工程提供高管团队建构及调整的实践启示。

英文摘要：

From the new perspective of longitudinal study, research hypotheses with regard to the relationship between Top Management Team （TMT） evolution and megaproject performance are proposed, which extends the static view of demographics and further incorporates the team interactive features. By tracing the 22 months implementation process of the infrastructure projects of Nan- ning East Railway Station, this study indicates that team interactive features have much more impacts on megaproject performance than demographics. Of all demographics （e. g. , age and professional background） , only the heterogeneity of professional background has a highly positive correlation with the megaproject performance. Among team interactive features, the internal information exchange and the climate of TMT all have significant positive correlations with the megaproject performance, while the external information exchange and the mutual influence between middle management team and TMT have moderate positive and highly negative correlations with the mega- project performance, respectively. The research findings enrich the theory of TMT, and meanwhile provide practical inspirations for TMT building in the emergence process of China＇s PPP projects.