Collaborative group project work in the classroom is common in many disciplines, because it teaches, encourages, and reinforces numerous skills and competencies that are desirable in the job market. However, group work brings with it a number of implementation challenges, one of the most important of which is varying contribution levels among group members. Peer evaluations, or assessments, all...

In a range of settings, private firms manage peer effects by sorting agents into different groups, be they schools, neighbourhoods or teams. This paper considers such a firm, which controls group entry by setting a series of anonymous prices. We show that private provision systematically leads to two distortions relative to the efficient solution: first, agents are segregated too finely; second...

This paper reviews research on grouping of students within classes and its effects on learning. Primary consideration is given to grouping and mixing students by ability, though consideration is also given to grouping and mixing students by ethnicity and gender as well as to research on the effects of group size. Results of meta-analyses of grouping show a small but meaningful advantage of form...