“…In terms of volunteers, it is commonly acknowledged that they can be extremely heterogeneous (Wilson and Pimm, 1996;Bussell and Forbes, 2002) and numerous studies have investigated a plethora of volunteer characteristics and their association with volunteering behaviour. Since the 1970s the value of segmentation for the third sector has been emphasised by social marketers because it not only identifies effective target markets but also helps develop effective programmes to reach these markets (Kotler, 1975;Raval and Subramanian, 2004). More specifically, in relation to the nonprofit sector, it has been postulated as a useful marketing tool in relation to blood donation (Burnett, 1981), fundraising and donations (Werner, 1992;Todd and Lawson, 1999;Webb et al, 2000) and volunteering (Wymer, 1997;Dolnicar and Randle, 2004).…”