We study a setting in which one or two agents conduct research on behalf of a principal. The agents' success depends on effort and the choice of a research technology that is uncertain with respect to its quality. A single agent has no incentive to deviate from the principal's preferred...

This paper investigates how ethnic diversity, measured by the immigrants' countries of origin, influences the well-being of the host country. Using panel data from Germany for the period 1998 to 2012, we find a positive effect of ethnic diversity on the well-being of German citizens. To...