Leider, Stephen; Mobius, Markus; Rosenblat, Tanya; Do, … - 2007
an anonymous treatment where neither player is told at the end of the experiment which decision was selected for payment … future. We can decompose altruistic preferences into baseline altruism towards any partner and directed altruism towards … friends. Decision makers vary widely in their baseline altruism, but pass at least 50 percent more surplus to friends compared …