Tax competition for the mobile factor capital has led to a trend in many countries to levy lower taxes on interest … such differential taxation on the debt ratio of firms. We exploit a 2009 tax reform in Germany as a quasi-experiment, which … introduced a flat final withholding tax and opened a gap of 18 percentage points between the tax rate on income from …

and tax policy. In this paper, I provide a test of the income pooling hypothesis using administrative cross …