Qiu, Jianying and Weitzel, Utz (2011): Reference dependent ambiguity aversion: theory and experiment. Unpublished.
Stoop, Jan; van Soest, Daan and Vyrastekova, Jana (2011): Carrots without Bite: On the Ineffectiveness of 'Rewards' in sustaining Cooperation in Social Dilemmas. Unpublished.