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Influences Of Return Migration On International Collaborative Research NetworksMurakami, YukikoAcademic and Scientific NetworksScientific Networks, Migration, International Networks, Knowledge Transfer, Co‐authorship Network, Collaboration NetworkTHURS.PM1Emigration of scientists facilitates the formation of international networks. However, are ties in such networks maintained after the scientists return to theirrespective home countries? This paper analyzes, using the data from the Web of Science, as to whether or not Japanese scientists returning from the U.S.maintain the collaborative research network ties that they formed during their stay in the U.S., and found some characteristics of the ties that are maintained.The physical distance between the U.S. and Japan can impede the transfer of tacit knowledge, which is important for research. Actually, approximately 90percent of the ties, which were formed while the Japanese scientists were living in the U.S., were severed after they returned to Japan. However, socialproximity can be a substitute for physical proximity. The ties that Japanese scientists formed with other Japanese scientists living in the U.S. are more likely tobe maintained than the ties they formed with scientists of different ethnicities. The social proximity was also measured by past experience in collaborativeresearch. The ties with collaborative research partners with whom the returnees more frequently published papers are more likely to be maintained. Inaddition, we found that other demographic features such as the type of organization one is working for and years of research experience and the field ofresearch also affect the probability of maintaining ties across borders.Informal Networks And Organizational Performance: An Empirical StudyDing, Haijie; Rigby, Jacob; Lee, JeremiahIntra‐Organizational Networks and Job PerformanceTrust, Centrality, Information Sharing, Team Performance, Social Network Analysis, Network StructureTHURS.PM1This paper investigates the empirical relationship between informal networks and organizational performance. We collected both social network data andorganizational performance data from over 20 branches of one of the biggest multinational express delivery companies operating in China. Three informalnetworks were mapped using a web‐based survey: information flow, positive energy flow and emotional trust. Four kinds of organizational performanceindicators were collected after 6‐months: financial performance, operational performance, customer satisfaction, and employee turnover. Analysis showedthat: (1) Average branch in‐degree, out‐degree, eigenvector centrality, betweenness centrality and density of the information flow network showed significantcorrelation with all performance indicators. Positive energy flow and emotional trust network metrics showed a similar correlation to performance with theexception of financial indicators. (2) Branch E‐I index showed a significant positive correlation with turnover rate on the emotional trust network. (3) Branchtriadic ratio showed a significant correlation with customer satisfaction on all three networks. Both conceptual and practical implications will be discussed inthe paper.