students' ability and past achievement, I use instrumental variables that are derived from two allocation rules that partly … suggest that increasing instruction hours and reducing class size have significant effects on students' achievements. The OLS …

almost 60 years, for both the affected cohorts and for their children. To do this, we exploit a natural experiment provided … faced by immigrant children were not correlated with other factors that affected the long-term outcomes of individuals. We … locality of residence was a Yemenite enclave. We find that children who were placed in a better environment (i.e. with better …