Based on theory of social embeddedness, firms' econom- ic behavior and outcome are embedded in their social connection structures. Interlock directorate is an important component of firms' social connections, and director networks can affect firms' decision-making process or firm value in complex ways. Scholars explore the influence of interlock directorates on firms' economic behavior and outcome from various perspectives, such as firm strat- egy, managerial incentive, firm performance etc. However, previ- ous research is mainly concerned ...