This paper challenges the view that tax base equalization by the so-called Representative Tax System (RTS) removes inefficient undertaxation in corporate tax competition. The innovation of the paper is that it focuses on a tax on corporate income, instead of the unit tax on capital considered in previous studies. We employ a tax competition model with fiscal equalization and show that the RTS fails to fully internalize pecuniary and fiscal externalities. As consequence, the RTS yields inefficiently low tax rates in the Nash equilibrium of the tax competition game between governments. Tax revenue equalization performs even worse, but combined with equalization of private income it implements the efficient tax rates on corporate income.
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This paper contributes to the literature on fiscal equalization and corporate tax competition. The innovation is that we explicitly model multinational enterprises and a corporate tax system that is designed according to formula apportionment. Two main results are obtained. First, in contrast to previous studies we identify cases where tax revenue equalization is better in mitigating detrimental tax competition than tax base equalization. Second, tax base equalization nevertheless has the advantage that it may render tax rates efficient, depending on the shape of the apportionment formula. A pure payroll formula does not ensure efficiency, but a back‐of‐the‐envelope calibration of our model to Canadian provinces suggests that a pure sales formula may be optimal.
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