Failure to express minority views may distort the behavior of company boards, committees, juries, and other decision-making bodies. Devising a new experimental procedure to measure such conformity in a judgment task, we compare the degree of conformity in groups with varying gender composition. Overall, our experiments offer little evidence that gender composition affects expression of minority views. A robust finding is that a subject’s lack of ability predicts both a true propensity to accept others’ judgment (informational social influence) and a propensity to agree despite private doubt (normative social influence). Thus, as an antidote to conformity in our experiments, high individual ability seems more effective than group diversity. Data, as supplemental material, are available at http://dx.doi.org/10.1287/mnsc.2015.2382 . This paper was accepted by John List, behavioral economics.

Abstract This paper investigates fairness perceptions of extreme income inequality generated in winner-take-all competitions. Two large-scale experiments with more than 7,000 participants from the general population of the U.S. show that extreme earnings inequality is widely accepted, even when the winner only slightly outperforms the runner-up. The effect of the winning margin on inequality acceptance is modest compared to the effect of shifting the source of inequality from luck to winning by the smallest possible margin. The experimental choices are systematically associated with broader fairness attitudes and policy preferences, including support for higher taxation of top earners and redistributive economic policy.

In a randomized controlled trial, we test whether removal of a barrier to exercise can improve academic performance.We find strong support for this hypothesis: university students who were provided with a free gym card exercised more and had a significant improvement in academic performance.The treated students were both less likely to drop out of classes and to fail at the exam.We provide evidence showing that exercise caused a healthier lifestyle and increased perceived self-control, which ultimately improved academic performance.The study demonstrates that removing barriers to physical activity can be an important tool for improving educational achievements.