The Response of Taxpayer Compliance to the Large Shock of Italian Unification

The unification of Italy in 1861 determined that all institutions of the pre-unitary states were replaced by those of the new-born Kingdom of Italy, thus implying common rules for agents formerly obeying to different ones. Moreover, a major tax reform was also set in that determined differential increments of the tax burden across provinces. We investigate the potential implications of these events for tax compliance. By comparing a province-level measure of tax evasion just after the reform with a corresponding recent one, we show a strong process of convergence in compliance. Non-negligible spatial differences in tax evasion, however, still persist nowadays. Further empirical evidence suggests that such differences can be at least in part traced back to the tax reform.