immigrant high school dropouts. One data source -- the CPS -- is plagued by non-response and allocation bias from the hot …-deck procedure that biases upward the estimated return to the GED. Correcting for allocation bias and ability bias, there is no …

Hierarchical and comprehensive school systems are compared with respect to efficiency. At given ability, a student …'s probability of not completing school rises with increasing mean ability in class. Both school systems can yield identical average … failure rates. Given that output losses in case of failure are stronger for more talented students, the comprehensive school …