Previous endowment effect experiments have examined circumstances in which people encounter a single unit of a good (e.g., one chocolate). We contrast single-unit treatments with multiple-unit treatments in which participants encounter several units of a good (e.g., five chocolates). We observe...

Making effective decisions under risk often requires making accurate predictions of other people's decisions under risk. We experimentally assess the accuracy of people's predictions of others' risky choices. In four studies, we find evidence of systematic inaccuracy: predictions of others'...