Switzerland radically changed its migration policy in the mid-nineties from a "non-qualified only" policy to one that favors the immigration of highly qualified migrants. To analyze the impact of this change on the schooling outcomes of migrants, this paper compares the PISA (OECD Programme for...

This paper reviews some of the most popular policy evaluation methods in empirical microeconomics: social experiments, natural experiments, matching, instrumental variables, discontinuity design, and control functions. It discusses identification of traditionally used average parameters and more...

Many policy interventions in the environmental sector aim at changing environmental preferences, because these provide the basis for adopting environmental conservation behavior or technologies. To evaluate these changes, standard measurement tools in survey-based impact evaluations have their...