“…In this vein, cooperation (Mulford et al 1998), volunteering (Wilson 2000), marriage (Rosenfield 2005), social interaction (Liebler and Sandefur 2002), and providing social support (Magdol and Bessel 2003) are explainable by the realization or expectation of reward or compensation. Related research has shown that the reward and compensation can include the help recipient's earlier or later help (Hofferth et al 1999), caring (Feeney and Collins 2001) such as parenting (Travis and Stremmel 1997), payment (Glendinning et al 1997) such as inheritance (Izuhara 2002), and offering of gifts (Joy 2001), praise (Okun et al 1998), and other materials (Cnaan and Cascio 1999). In the creation of social capital, exchange theory implies that offering help is a result of calculation about investment and reciprocation (Cheung and Gui 2006;Mulford et al 1998).…”