We examine the influence of team size on decision making in a beauty-contest experiment.Teams with four members outperform teams with two members and single personssignificantly, whereas the latter two types of decision makers do not differ.

Several current social utility models posit fairness as a motive for certain types of strategic behavior. The models differ sharply with respect to how fairness is measured. Distribution models measure fairness in terms of relative payoff comparisons. Reciprocal-kindness models measure fairness...