“…First, we directly contribute to recent studies on the coexistence of agency and stewardship governance in family firms (Chrisman, 2019;Hernandez, 2012;Madison et al, 2016Madison et al, , 2018 by introducing and examining professional management practices as enabling factors that drive and reinforce both forms of governance simultaneously. By adopting professional management practices, family firms can strengthen their unique competitive advantage of steward managers, who have long-term perspectives and deeply care about sustaining a strong reputation and long-term survival of the business (Eddleston et al, 2018;Wilhelm et al, 2022), while at the same time addressing agency problems (i.e., nepotism, adverse selection, and moral hazard), which we argue are more severe among family firms. Once both agency and stewardship governance are mutually manifested by being professional, our findings revealed that family firms benefit more from management professionalization than nonfamily firms in terms of both profitability and sustainability reputation.…”