Ethnicity and homophily effects in US M&As

We show that ethnic diversity of CEOs of merging firms has been increasing and report evidence of ethnic homophily effect in M&As transactions. Specifically, M&As perform better when the CEOs of the merging firms share a common ethnic background. In a sample of 444 US mergers completed between 2000 and 2018, we find that ethnic homophily improves the probability of deal completion. Furthermore, we report mild variation of performance across ethnic groups. White CEOs exhibit better postmerger performance while Asian CEOs instigate a better market reaction (announcement return). Subsequent analyses show that White CEOs tend to have longer tenure and longer experience while Asian CEOs tend to be more transparent. We discuss our findings in light of a few extant theories and show that our findings are robust to several additional tests including instrumental variables, Heckman's selection bias correction, and several variations in the model specifications and definitions of key variables.