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Over the previous two decades, many OECD countries have lowered the degree of progressivity in their tax structures. In this paper, I investigate labour tax progression in a world characterised by a segmented labour market where the higher-paying jobs are rationed due to (i) oligopolistic market structures, (ii) insider-oriented unions and (iii) international offshoring. In this second-best world, a revenue-neutral decrease in the progressivity of the tax schedule promotes higher domestic (net-of-tax) wage inequality where a shrinking fraction of workers provides the tax revenue to finance the redistribution to an increasing share of lower-wage workers. However, as the tax reform involves an increase in the offshoring intensity, which may translate into a cost advantage for the domestic average consumer, the overall welfare effect is ambiguous. It is shown that the negative effects dominate if trade unions are sufficiently insider-oriented.

In oligopolistic industries, increased cost saving opportunities via offshoring have a moderating effect on trade unions. In order to discourage mobile firms from leaving the country, unions accept lower sector wages. In effect, the negotiated wage becomes independent of workers' bargaining power and their domestic outside opportunities. Hence, wage moderation - induced by deeper economic integration - creates leeway for the government to engage in redistributive policies even if this improves the workers' outside options. Only if the latter become sufficiently attractive will redistribution induce some offshoring, and it is only at that level that further economic integration will lead to both wage moderation and offshoring activities. Therefore, our analysis suggests that rather than provoking a downsizing of the welfare state, offshoring defines an upper limit for the generosity of the welfare state below which redistribution becomes less instead of more distortive.

Abstract To what extent do reductions in corporate income tax (CIT) rates attract foreign tax bases? What are the revenue implications of a unilateral tax reduction when tax bases are internationally mobile? These questions are explored using annual data from 17 OECD countries spanning the period 1982 to 2005. Controlling for fixed country effects, year effects, and country time trends, and subjecting our results to an extensive robustness analysis, we find (i) a country's aggregate reported corporate profits are negatively and significantly affected by CIT rate reductions in neighbouring countries; (ii) a unilateral reduction in the domestic CIT rate results in lower domestic CIT revenues.

In oligopolistic industries, increased cost saving opportunities via offshoring have a moderating effect on trade unions. In order to discourage mobile firms from leaving the country, unions accept lower sector wages. In effect, the negotiated wage becomes independent of workers' bargaining power and their domestic outside opportunities. Hence, wage moderation - induced by deeper economic integration - creates leeway for the government to engage in redistributive policies even if this improves the workers' outside options. Only if the latter become sufficiently attractive will redistribution induce some offshoring, and it is only at that level that further economic integration will lead to both wage moderation and offshoring activities. Therefore, our analysis suggests that rather than provoking a downsizing of the welfare state, offshoring defines an upper limit for the generosity of the welfare state below which redistribution becomes less instead of more distortive.

In oligopolistic industries that are unionised and may be affected by offshoring, falling offshoring costs have a moderating effect on trade unions. They will accept lower sector wages in order to discourage mobile forms from leaving the country. Since such wages are independent of the workers' domestic outside opportunities, wage moderation - induced by deeper economic integration - creates leeway for the government to engage in redistributive policies even if this improves the workers' domestic outside options. Only if the latter become sufficiently attractive will redistribution induce some offshoring, and it is only at that level that further economic integration will lead to both wage moderation and offshoring activities. Therefore, our analysis suggests that rather than provoking a downsizing of the welfare state, offshoring defines an upper limit for the generosity of the welfare state below which redistribution becomes less instead of more distortive.

In oligopolistic industries that are unionised and may be affected by offshoring, falling offshoring costs have a moderating effect on trade unions. They will accept lower sector wages in order to discourage mobile firms from leaving the country. Since such wages are independent of the workers' domestic outside opportunities, wage moderation - induced by deeper economic integration - creates leeway for the government to engage in redistributive policies even if this improves the workers' domestic outside options. Only if the latter become suffciently attractive will redistribution induce some offshoring, and it is only at that level that further economic integration will lead to both wage moderation and offshoring activities. Therefore, our analysis suggests that rather than provoking a downsizing of the welfare state, offshoring defines an upper limit for the generosity of the welfare state below which redistribution becomes less instead of more distortive.