“…The empirical results obtained to date (see Table 1) predominantly indicate that buyer anonymity decreases the average amount paid in PWYW settings (Bondos and Lipowski, 2016;Dorn and Suessmair, 2016;Hilbert and Suessmair, 2015;Kim et al, 2014a (study 1); Lee et al, 2015;Machado and Sinha, 2012;Pöyry and Parvinen, 2014;Riener and Traxler, 2012;Morwitz, 2011, 2013;Veit and Ammermann, 2013). However, the negative effects are primarily reported in studies of hypothetical intentions to pay in student samples whose validity is highly questionable.…”