Over the last 25 years, more than a hundred dictator game experiments have been
published. This meta study summarises the evidence. Exploiting the fact that most …

We conducted online field experiments in large real-world social networks in order to
decompose prosocial giving into three components:(1) baseline altruism toward randomly …

We conduct an exploratory study using a customized Facebook application to understand
how social ties are linked to an economic measure of trust. We employ the Investment …

Economists are increasingly interested in how group membership affects individual
behavior. The standard method assigns individuals to “minimal” groups, ie arbitrary labels …

Firms are often organized into groups. Group membership has been shown empirically to
have positive effects, in the form of increased prosocial behavior toward in-group members …

We study the effects of network externalities within a protocol for matching faculty to offices in
a new building. Using web and survey data on faculty's attributes and choices, we identify …

This paper investigates how dictator giving varies by social context and worthiness of the
recipient. We conduct lab-in-the-field experiments in Kamchatka, Russia, and Western …

Indirect reciprocity has been proposed to explain prosocial behavior among strangers,
whereby the prosocial act is returned by a third party. However, what happens if the …

We study how social interaction and friendship shape students' political opinions in a natural
experiment at Sciences Po, the cradle of top French politicians. Quasi-random assignments …

Blood donations are increasingly important for medical procedures, while meeting demand
is challenging. This paper studies the role of spillovers arising from social interactions in the …