The twenty-five German states from 1871 to 1914 present a useful data set for examining how increasing economic integration affects tax policy. After German unification the national government collapsed six currencies into one and liberalized preexisting restrictions on capital and labor mobility. In contrast, the empire did not directly interfere in the making of state tax policy; while states transferred certain indirect taxes to the central government, they maintained their own autonomous tax and political systems through World War I. This paper examines the extent to which tax competition forced the individual state tax systems to converge from 1871 to 1914. In spite of a diversity of political systems, tax competition did require states to harmonize their rates on mobile factors like capital and high income labor, but it did not affect tax rates on immobile factors. In states where the political system guaranteed agricultural dominance, taxes on land were reduced, while in states with more open systems, tax rates remained higher. One unexpected result is that tax rates on capital and income converged upward instead of downward. The most dominant state, Prussia, served as the lowest-common-denominator state, but pressure from the national government, especially to increase expenditures, forced all states to raise their tax rates. These results suggest possible ways for the European Union to avoid a forced downward convergence of member state tax rates on capital and mobile labor.
Tax competition and tax structure in open federal economies: Evidence from OECD countries with implications for the European Union