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Purpose The purpose of this paper is to explore the influence mechanism of job satisfaction and positive affect on knowledge sharing among project members in Chinese construction industry, and test the moderating role of organizational commitment between them in order to find a new approach from the perspective of psychology to improve the knowledge sharing performance within project management organizations in China constantly. Design/methodology/approach An empirical study was used based on confirmatory factor analysis and hierarchical regression analysis with a sample of 540 project members from 80 project management organizations in China. Findings Research results showed that job satisfaction and positive affect of project members both have a significant positive impact on knowledge sharing; organizational commitment could moderate the influence of job satisfaction and positive affect on knowledge sharing among project members partially within the Chinese context. Research limitations/implications A questionnaire study from China only represents the relationship and regular pattern within a shorter time interval in the Chinese context. It is necessary to continue to implement a longitudinal study in a relatively long period in future research. Practical implications Knowledge sharing among project members can be enhanced through improving job satisfaction and positive affect, and strengthening project members’ organizational commitment can amplify the influence effect of job satisfaction and positive affect on knowledge sharing. Originality/value This paper clarifies the direct influence mechanism of project members’ job satisfaction and positive affect on explicit knowledge sharing (EKS) and tacit knowledge sharing (TKS), and further tests the partial moderating effect of organizational commitment on the influence relationship of job satisfaction and positive affect on EKS and TKS.

The rapid construction of emergency hospitals in areas with a severe COVID-19 outbreak was one of the effective ways to contain and fight the pandemic. However, such rapid construction megaprojects need more than a formal management system to drive the organizational citizenship behavior (OCB) of participants in order to compensate for the lack of formal rules and regulations. Two emergency hospitals especially built for COVID-19 are taken as case studies in this paper to establish a mechanism model and examine the impact of the perceived strength of the COVID-19 event on the emergency megaproject citizenship behavior (EMCB) based on affective events theory (AET). Data from 340 project participants in the two hospitals were collected and tested using structural equation modeling. The results demonstrate that first, the positive affect induced by the COVID-19 event is the direct antecedent that promotes EMCB. Participants' cognition of event criticality and event novelty was seen to have a positive driving effect on the positive affect. However, their cognition of event urgency and event disruption only triggers negative affect. Second, the positive affect induced by the COVID-19 event was seen to have a strong positive and direct promoting effect on the six dimensions of EMCB. Contrary to expectations, the negative affect induced by the COVID-19 event does not significantly influence the six dimensions of EMCB. This study provides empirical suggestions for project managers on how to motivate EMCB through public emergency management to help achieve project objectives.

China’s construction industry developed rapidly and safety production has become a vital issue. Improving the safety behavior of construction workers is an important measure to effectively decrease construction safety accidents. At present, a New Generation of Construction Workers (NGCWs) born after 1980 has gradually become the main force of construction companies in China and the special group characteristics coming from the intergenerational difference may make them behave differently in safety-related activities, therefore, it is very important to study how to promote their safety behavior. This paper aimed to explore the influencing mechanism of job satisfaction on the safety behavior of NGCWs and examine the mediating role of safety knowledge sharing and work engagement. Confirmatory factor analysis and structural equation modeling analysis were applied to test the theoretical model. Empirical research results indicated that job satisfaction can effectively promote safety behavior through safety knowledge sharing and work engagement. Safety knowledge sharing plays a complete mediating role between job satisfaction and safety compliance behavior, as well as between job satisfaction and safety participation behavior. Moreover, work engagement plays a complete mediating role between job satisfaction and safety participation behavior, which can provide valuable management references for China’s construction companies to strengthen their safety behavior.