Family businesses differ from traditional businesses in that they are owned or controlled by family members. Because of the potential for family member’s influence, family businesses face many unique and complex problems (Davis & Stern, 1980, Handler, 1989). However since the investigation of the connection between family involvement and organizational processes and outcomes is still in its infancy (Bellet, Dunn, Heck, Parady, Powell and Upton, 1996) many conflicting claims regarding the purported effects of family member involvement remain unresolved. The organizational processes focused on in this research are differences in planning and control practices between family businesses and non-family businesses. It is often said that family businesses plan much less than non-family firms. Several authors however indicate in the literature that observed differences between family and non-family firms in empirical research are often caused by industry differences, size differences, location differences, strategy differences, etc… In order to avoid this pitfall we have constructed our research sample along the following lines. We have chosen for our research population firms from just one industry namely the wholesale sector. In this way differences in environmental uncertainty are reduced to a certain extent. The following criteria dominated further the choice of the research population: growth rate (fast growth, slow growth and no growth), size (measured by balance sheet total) and location ( Flanders – Belgium). In total 616 companies (409 small companies and 207 medium-sized companies) were sent a survey. The questionnaire covered questions on the company’s family character, its firm activities, the motives for growth, the enabling and disabling factors for growth, the consequences of growth, and planning and control practices. The response rate for the small wholesale firms was 21,8% (89 usable responses) and the response rate for the medium-sized wholesale f