The purpose of this research study is to empirically test the impact of mastery climate (MC) on project performance (PP) through the mediating role of collaboration in team (CIT) and moderating role of prosocial behaviour (PSB). The probability random sampling technique and two-time lags T1 = 327 and T2 = 300 was used to collect data from employees working in project-based construction companies of Pakistan. Partial least squares-structural equation modelling (Smart PLS SEM v.3.2.8) software was used to test hypotheses. The result indicates that MC has a significant and positive impact on PP. Also, CIT is considered as a potential mediator between MC and PP. However, findings indicate that PSB positive effects on project performance at T1 but after passing time at T2 negative effects on project performance. Furthermore, study significantly contributes to the area of research in the domain of project management. In the end, the implications for project managers and future research are discussed.

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Mastery climate,Collaboration in team,CIT,Prosocial behaviour,Project performance

• Economics and Business - Social Sciences