This paper develops a nonparametric theory of preferences over one's own and others' monetary payoffs. We introduce "more altruistic than" (MAT), a partial ordering over such preferences, and interpret it with known parametric models. We also introduce and illustrate "more generous than" (MGT),...

The authors report successive rounds of theory and laboratory experiments investigating price-taking behavior and market efficiency. They focus on the impact of structural parameters as well as trading institution. The structural parameters involve noncompetitive supply and demand, and a new...

We discuss how small group interactions overcome evolutionary problems that might otherwise erode vengefulness as a preference trait. The basic viability problem is that the fitness benefits of vengeance often do not cover its personal cost. Even when a sufficiently high level of vengefulness...

The effects of trading institutions on market efficiency and trading volume are examined. The trading institutions are computerized versions of continuous double auction and clearinghouse markets. Traders are experienced, profit-motivated undergraduates. The traded good is a financial asset...

We study learning in an individual choice price forecasting task in which subjects must learn coefficients of two independent variables in stationary linear stochastic processes. The 99 subjects each forecast in 480 trials with feedback. Learning is tracked by fitting individual forecasts to the...

We explore the stability of imitation in a 1200-period experimental Cournot game where subjects do not know the payoff function but see the output quantities and payoffs of each oligopolist after every period. In line with theoretical predictions and previous experimental findings, our...

We explore the stability of imitation in a 1,200-period experimental Cournot game where subjects do not know the payoff function but see the output quantities and payoffs of each oligopolist after every period. In line with theoretical predictions and previous experimental findings, our...