oTree is an open-source and online software for implementing interactive experiments in the laboratory, online, the field or combinations thereof. oTree does not require installation of software on subjects' devices; it can run on any device that has a web browser, be that a desktop computer, a...

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...

Experts and workers in many domains make multiple similar but independent decisions in sequence. Previous research has shown that the serial position of the case in the sequence, an irrelevant factor, often influences the decision. Yet, the conditions under which serial position effects emerge...