According to the existing literature, capital taxes should not be imposed in the presence of optimal profit taxation in either unionised or competititive labour markets. We show that this conclusion does not hold for an economy with both competitive and unionised sectors, where the competitive...

According to conventional wisdom internationally mobile capital should not be taxed or should be taxed at a lower rate than labour. An important underlying assumption behind this view is that there are no market imperfections, in particular that labour markets clear competitively. At least for...