“…Extrinsic motivations derive from material incentives (Bednall and Bove, 2011;France et al, 2014), but need not be monetary in nature (Chell et al, 2018). The effects of monetary incentives have been extensively investigated with mixed results (Niza et al, 2013;Weidmann et al, 2014;Van Dyke et al, 2020;Lacetera et al, 2012), and the actual possibility to introduce this kind of remunerative incentives depends largely on the national legislation of the country in which the transfusional system is situated (Group, 2012;Allain, 2011). Blood centers in different countries have implemented policies encompassing both monetary and non-monetary incentives for donors, but their efficacy depend from individual characteristics, donors experience and contextual factors (Piersma et al, 2017).…”