Social animals including humans share a range of social mechanisms that are automatic
and implicit and enable learning by observation. Learning from others includes imitation of …

Some of the most fundamental questions concerning our evolutionary origins, our social
relations, and the organization of society are centred around issues of altruism and …

Large language models have been shown useful in multiple domains including
conversational agents, education, and explainable AI. ChatGPT is a large language model …

An indispensable survey of new developments and results in experimental economics When
The Handbook of Experimental Economics first came out in 1995, the notion of economists …

Game theory, the formalized study of strategy, began in the 1940s by asking how
emotionless geniuses should play games, but ignored until recently how average people …

We demonstrate that a simple model, constructed on the premise that people are motivated
by both their pecuniary payoff and their relative payoff standing, organizes a large and …

Environments with public goods are a wonderful playground for those interested in delicate
experimental problems, serious theoretical challenges, and difficult mechanism design …

A critical question facing experimental economists is whether behavior inside the laboratory
is a good indicator of behavior outside the laboratory. To address that question, we build a …

SUBJECTS IN ECONOMIC LABORATORY experiments have clearly expressed an interest
in behaving unselfishly. They cooperate in prisoners' dilemma games, they give to public …

One lingering puzzle is why voluntary contributions to public goods decline over time in
experimental and real-world settings. We show that the decline of cooperation is driven by …