“…In addition to individual incentive and expectation structures, organizational factors such as involvement in the club, club memberships of one's own children, the perceived club climate, staff management, the reputation of the club, or the accumulated human and social capital obviously play a role in whether, to what extent and in what form members volunteer in the sports club (Flatau, 2009 ; Dwyer et al, 2013 ; Schlesinger et al, 2013 , 2014 ; Egli et al, 2014 ; Malinen and Harju, 2017 ; Swierzy et al, 2018 ; Wicker et al, 2018 ). As a third level, contextual factors such as political, social or economic conditions should also be considered to explain individual volunteering and related gender differences in the context of a multilevel analysis (Bühlmann and Freitag, 2004 , 2007 ). These analyses should not rely on quantitative methods alone, but should integrate qualitative methods in order to explain statistical findings comprehensively (Kelle, 2007 ) and to understand the mechanisms of reproduction of social inequality.…”