Studies have found that people are overconfident in estimation involving difficult tasks but underconfident in easy tasks. Conversely, they are overconfident in placing themselves in easy tasks but underconfident in hard tasks. These findings can be explained by a regression hypothesis that...

Social identity theory has become increasingly important for economists. I discuss the contribution of Van Bavel and Packer's "The Power of Us" in light of what economists (especially experimental ones) can learn from their research.