Although the family business research field and related disciplines are paying increasing attention to improvements in methodology, there is still insufficient attention being paid to endogeneity issues. We therefore raise awareness of endogeneity and suggest ways to reduce biased results in family business studies. We review publications in the family business literature in terms of (1) the consideration of endogeneity issues, (2) sources of endogeneity for different research topics, and (3) various methods that researchers have used to control for endogeneity. We discuss important lessons learned from the review and offer methodologically oriented recommendations for future family business studies.