We test the hypothesis that "genuine" or "convincing" smiling is a costly signal that has evolved to induce cooperation in situations requiring mutual trust. Potential trustees in a trust game made video clips for viewing by potential trusters before the latter decided whether to send them...

When an individual performs several tasks simultaneously, resources must be allocated to different brain systems to produce energy for neurons to fire. Following the evidence from neuroscience, we model the brain as an organization in which a coordinator allocates limited resources to the brain...

This paper addresses the nature, formalization, and neural bases of (affective) social ties and discusses the relevance of ties for health economics. A social tie is defined as an affective weight attached by an individual to the well-being of another individual (‘utility interdependence’)....

When entering retirement most people face the decision whether they would like their defined contribution account balance paid as a lump sum or to annuitize the amount. The fact that people tend to choose the lump sum even if economic reasons suggest not to is called the annuity puzzle. In a...

A tradition from Knight (1921) argues that more risk tolerant individuals are more likely to become entrepreneurs, but perform worse. We test these predictions with two risk tolerance proxies: stock market participation and personal leverage. Using investment data for 400,000 individuals, we...

An intense debate on the use of limited-voting shares developed in the UK during the 1950s. Using a unique hand-collected dataset, we show that negative news coverage of limited-voting shares is associated with an increase in the relative price of voting and limited-voting shares (the voting...

Stock market investment decisions of individuals are positively correlated with that of co-workers. Sorting of unobservably similar individuals to the same workplaces is unlikely to explain our results, as evidenced by the investment behavior of individuals that move between plants. Purchases...

We conduct a laboratory experiment in which we expose participants to situational social norms of approval or disapproval of lying. While participants on average conform to the situational pressure, the results highlight important differences in individual reactions. Situational norms crowd out...

From the end of the second century C.E., Judaism enforced a religious norm requiring any Jewish father to educate his children. We present evidence supporting our thesis that this exogenous change in the religious and social norm had a major influence on Jewish economic and demographic history....

Extensive multilingualism is one of the most important and fundamental principles of the European Union. However, a large number of official languages (currently 23) hinders communication and imposes substantial financial and legal costs. We address the merits of multilingualism and formulate an...