Minimum hourly wages were randomly imposed on firms posting job openings in an online labor market. A higher minimum wage raised the wages of hired workers substantially. However, there was some reduction in hiring and large reductions in hours-worked. Treated firms hired more productive...

Online labor markets have great potential as platforms for conducting experiments, as they provide immediate access to a large and diverse subject pool and allow researchers to conduct randomized controlled trials. We argue that online experiments can be just as valid - both internally and...

Minimum hourly wages were randomly imposed on firms posting job openings in an online labor market. A higher minimum wage raised the wages of hired workers substantially. However, there was some reduction in hiring and large reductions in hours-worked. Treated firms hired more productive...

In some online labor markets, workers are paid by the task, choose what tasks to work on, and have little or no interaction with their (usually anonymous) buyer/employer. These markets look like true spot markets for tasks rather than markets for employment. Despite appearances, we find via a...

We report the results of a field experiment in which treated employers could not observe the compensation history of job applicants, whereas control employers could. We find no evidence that treated employers relied more heavily on alternative signals of productivity. Instead, they responded by...

In a large online market, buyers were given the opportunity to signal their relative preferences over price and quality—first experimentally, then later as the default experience in the market. The possibility of signaling caused substantial sorting by sellers to buyers of the right...

We report the results of a field experiment in which treated employers could not observe the compensation history of their job applicants. Treated employers responded by evaluating more applicants, and evaluating those applicants more intensively. They also responded by changing what kind of...