The core idea of evolution is that order in living systems emerges from a simple process of variation and selection. In biological systems we usually understand the source of variation as best described by the mechanisms of genetics. If human social systems are evolutionary systems, however, it...

Organizations often use non-monetary awards to incentivize performance. Awards may affect behavior through several mechanisms: by conferring employer recognition, by enhancing social visibility, and by facilitating social comparison. In a nationwide health worker training program in Zambia, we...

Previous studies have shown that people believe in the existence of the “hot hand” effect: recent good performances make one more confident and lead to more good performances. However, economists have found little evidence that such an effect is present. Motivated by models of momentum from...

The full-information rational expectations model is clearly rejected by the data. The expectation formation process has therefore important implications for macroeconomic outcomes. We examine how consumers react to information provided by the media, by taking into account that this information...

In this article, we investigate the possibility of sunspot equilibria to emerge from a process of learning and adaptation on agents’ beliefs. We consider both finite state Markov sunspots and sunspots in autoregressive form, and derive conditions for the existence of an heterogeneous...

In negotiated transactions the act of choosing trading partners and “who chooses” creates a bargaining culture that influences trading behavior. Results are presented from experimental markets in which paired buyers and sellers negotiate the repeated sale of units. Relative to a market...

We investigate experimentally the effect of consultation (unincentivized advice) on choices under risk in an incentivized investment task. We compare consultation to two benchmark treatments: one with isolated individual choices, and a second with group choice after communication. Our benchmark...

This paper studies unshrouding decisions in a framework similar to Gabaix and Laibson (2006), but considers an alternative unshrouding mechanism where the impact of advertising add-on information depends on the number of unshrouding firms. We show that shrouding becomes less prevalent as the...

Single-sex classes within coeducational environments are likely to modify students’ risk-taking attitudes in economically important ways. To test this, we designed a controlled experiment using first year college students who made choices over real-stakes lotteries at two distinct dates....

In a large number of decisions, the option that does not require a specific action such as filling in a form is chosen frequently. It is a stylized fact that opt-in or opt-out designs for otherwise identical choices lead to vastly different outcomes. Choice options are chosen more frequently...