I develop a model of (individually rational) collective reality denial in groups, organizations and markets. Whether participants' tendencies toward wishful thinking reinforce or dampen each other is shown to hinge on a simple and novel mechanism. When an agent can expect to benefit from other's...

We conducted a field experiment in a 401(k) plan to measure the effect of disseminating information about peer behavior on savings. Low-saving employees received simplified plan enrollment or contribution increase forms. A randomized subset of forms stated the fraction of age-matched coworkers...

The overconfidence bias is discussed extensively in economic studies, yet fails to hold experimentally once monetary incentives and feedback are implemented. We consider overconfidence as a social bias. For a simple real effort task, we show that, individually, economic conditions effectively...

We investigate how the convexity of a firm's incentives interacts with worker overconfidence to affect sorting decisions and performance. We demonstrate, experimentally, that overconfident employees are more likely to sort into a nonlinear incentive scheme over a linear one, even though this...

Explicit economic incentives designed to increase contributions to public goods and to promote other pro-social behavior sometimes are counterproductive or less effective than would be predicted among entirely self-interested individuals. This may occur when incentives adversely affect...

Newspaper critics’ movie reviews are often used by potential movie viewers as signals of expert quality assessment. We investigate the existence and revenue impact of racial bias in these reviews. Using an expansive, novel dataset spanning 2003–2007, we find ratings for movies with a black...

Decision researchers conduct laboratory experiments of choice between real rewards, but also often rely on asking people to provide hypothetical answers to fictitious situations. Applying results from such studies to real-world situations requires understanding how decision making in cases...

Using a high-stakes field experiment conducted with a financial brokerage, we implement a novel design to separately identify two channels of social influence in financial decisions, both widely studied theoretically. When someone purchases an asset, his peers may also want to purchase it, both...

We set up an experiment to study whether disclosure of the advisor's interests can foster truthfulness and trust. We measure how advisors expect decisionmakers to react to their advice in order to distinguish between strategic and moral reactions to disclosure by advisors. Results indicate that...

We introduce a new method for measuring the decision to lie in experiments. In the game, the decision to lie increases own payment independent of the counterpart's decision, but potentially at a cost for the counterpart. We identify at the individual level the decision to lie, and measure how...