We show the identification of important features of the model in a perfect information entry game with two players and asymmetric payoffs when there are no unbounded regressors and the distribution of the unobservables is not parametrically specified.

Recent papers indicate that children who are relatively old-for-grade have a significantly lower incidence of ADHD diagnosis. We find that this is not the case in Denmark, suggesting that diagnoses are less subjective in a regime where only specialists diagnose.

We investigate pre-teenage effects of type of non-parental child care at age three (preschool versus more informal family day care) on overall and risky behavior and objective and self-evaluated abilities. We find no strong evidence that one type of non-parental care outperforms the other,...