We conduct a field experiment involving real purchasing decisions in a large supermarket chain to test the effect of different regulatory interventions aiming to induce a more climateâ€friendly diet on intrinsic motivation. Focusing on shoppers who prefer the dirty variety, we compare...

In a repeated public goods setting, we explore whether individuals, acting unilaterally, will provide an effective sanctioning institution. Subjects first choose unilaterally whether they will participate in a sanctioning stage that follows a contribution stage. Only those who gave themselves...

Economists have traditionally assumed that individual behavior is motivated exclusively by extrinsic incentives. Social psychologists, in contrast, stress that intrinsic motivations are also important. In recent work, economic theorists have started to build psychological factors, like intrinsic...

The underlying motivations for envy or related social preferences and their impact on agricultural innovations are examined by combining data from money burning experimental game and household survey from Ethiopia. In the first stage of the money burning experimental game, income inequality is...

Apesteguia and Palacios-Huerta (APH, forthcoming) report for a sample of 129 soccer penalty shootouts from various seasons in ten different tournaments that teams kicking first win significantly more often than teams kicking second by a margin of 21 percentage points. Collecting data for 470...

Are prices or quantities the best regulatory instrument to align private actions with public interests in the presence of externalities? We add another dimension to this ongoing debate by experimentally analyzing the interaction between instrument choice and intrinsic motivation of regulated...

We analyze a group contest in which n groups compete to win a group-specific public good prize. Group sizes can be different and any individual player may value the prize differently within and across groups. Players expend costly efforts simultaneously and independently. Only the highest effort...

We investigate situations in which players make costly contributions as group mem- bers in a group conflict, and at the same time engage in contest with fellow group members to appropriate the possible reward. We introduce within group power asymmetry and complementarity in members' efforts and...