Who benefits from tax competition in the European Union?

Domestic distortions proof highly relevant as even unilateral reductions of the corporate income tax rate might reduce welfare if the labour tax rate has to be increased. Profit shifting induces countries to underbid each others tax rates, but this effect is sizable only if two countries are closely linked. The harmful external effects of CIT rate reductions are limited, which reduces the need for European coordination of CIT rates.