Using a natural experiment designed by the Italian national test administrator (INVALSI) to monitor test procedures in Italian primary schools, this paper shows that the presence of an external examiner who monitors test procedures has both a direct and an indirect effect on the measured...

We study the contribution of health-related behaviors to the health education gradient by distinguishing between short-run and long-run mediating effects: while in the former only behaviors in the immediate past are taken into account, in the latter we consider the entire history of behaviors....