This dissertation evaluates the effectiveness of public interventions in tax policy (such as a tax compliance campaign in Greece), the performance of public institutions that dictate land zoning (corruption of zoning officials in Greece and Spain) and public health (publicly-provided health insurance; namely, Medicaid). The common underlying theme of the dissertation is the public nature of the policies examines with an empirical emphasis. The ultimate goal of this research body is to provide credible policy solutions for the improvement of public administration.