Moral awareness polarizes people's fairness judgments.

How does moral awareness affect people's fairness judgments? Using a simple model of identity utility, I predict that if individuals differ in their personal fairness ideals (equality versus efficiency), reflecting over what one thinks is right should not only make people's choices less selfish but also more polarized. On the other hand, people's desire for conforming with the behavior of their peers could help mitigate polarization. I test these conjectures in a laboratory experiment, in which participants can pursue different fairness ideals.

Echo chambers and opinion dynamics explain the occurrence of vaccination hesitancy.

Vaccination hesitancy is a major obstacle to achieving and maintaining herd immunity. Therefore, public health authorities need to understand the dynamics of an anti-vaccine opinion in the population. We introduce a spatially structured mathematical model of opinion dynamics with reinforcement.

Internal conflict, market uniformity, and transparency in price competition between teams.

The way profits are divided within successful teams imposes different degrees of internal conflict. We experimentally examine how the level of internal conflict, and whether such conflict is transparent to other teams, affects teams' ability to compete vis-à-vis each other, and, consequently, market outcomes. Participants took part in a repeated Bertrand duopoly game between three-player teams which had either the same or different level of internal conflict ( vs.