We use the strategy method to classify subjects into cooperator types in a large-scale online Public Goods Game and find that free riders spend more time on making their decisions than conditional cooperators and other cooperator types. This result is robust to reversing the framing of the game...

We study persuasion effects in experimental ultimatum games and find that Proposers' payoffs significantly increase if, along with offers, they can send messages which Responders read before deciding. Higher payoffs are driven by both lower offers and higher acceptance rates.

This paper uses a modified dictator game to investigate the relationship between response times and social preferences. We find that faster subjects more often chose the option with the highest payoff for themselves. Moreover, our within-analysis reveals that, for a given individual, payoff...