“…As Norwegians and Germans are almost equally rich and were almost just as productive in the experiment, only nationality considerations could explain a difference in the transfers in the two types of distributive situations. Finally, to study the extent to which our findings were the result of a self-serving bias among the rich, the poor participants also made a similar 1 For related experimental studies of social preferences, see Aguiar, Brañas-Garza, and Miller (2007) and Eckel and Grossman (1996) on the role of needs, Cappelen, Hole, Sørensen, and Tungodden (2007a); Cappelen, Sørensen, and Tungodden (2007b) ;Cherry, Frykblom, and Shogren (2002) ;Frohlich, Oppenheimer, and Kurki (2004); Konow (2000), and Konow (1996) on the role of entitlements, and Whitt and Wilson (2007) on the role of nationality. For an overview of the experimental literature on social preferences, see Camerer (2003).…”