explain differences in the rate of human capital accumulation on the job. Data tracking national soccer team performance and … individual has been a member of an elite team than when he has been a member of lower level teams. The conclusion is borne out by … a rich set of complementary data on: national team performance, player-level performance, performance of foreign players …

from a laboratory experiment in which subjects choose their group membership, which is interpreted as decision to identify … with the respective group. Inducing a trade-off between monetary payoffs and different group identification choices we … individual out-group discrimination in allocation decisions, which has previously been shown to be associated with social …