We explain the main features of the results of the four-country ultimatum bargaining experiments of Roth, Prasnikar, Okuno-Fujiwara, and Zamir (1991) by a social utility model. The specification of social utility of a player has two parts: a linear combination of the monetary payoffs of the...

This paper reports experiments designed to study strategic sophistication, the extent to which behavior in games reflects attempts to predict others' decisions, taking their incentives into account. We studied subjects' initial responses to normal-form games with various patterns of iterated...