“…Professionalization variable captures the extent to which a nonprofit is staffed and run by paid personnel, including staff members, employees, and CEOs (Hwang & Powell, 2009; Lu & Park, 2018; Suárez, 2010). Following previous scholarly approaches, I use a professionalization index score 5 created by summing four dichotomous indicators available in Form 990: (a) whether the organization is staffed by any paid full-time personnel (operationalized as the dichotomous variable of employees, reported in Part VIII from Form 990), (b) whether the organization uses only paid personnel to deliver services (operationalized as the dichotomous variable of volunteers, reported in Part I from Form 990), (c) whether the organization is managed by an executive director (operationalized as the dichotomous variable of the presence of the executive director, reported in Part VII from Form 990), and (d) whether the organization maintains a full-time executive director position (operationalized as the dichotomous variable of executive director compensation, reported in Part VII from Form 990).…”