摘要：Abstract The main objective of this study is to quantify the impact caused by changes in federal tax on the tax policy of the Brazilian states, considering the presence of horizontal tax competition between states. Using panel data covering 26 Brazilian states plus the Federal District during the period 1995–2009, two models were estimated representing the average reaction of the states in response to changes in federal tax rates. In the first model, both levels of government act simultaneously, whereas in the second model, reaction is sequential, with the federal government acting as the leader in defining its effective tax rates. The results indicate a positive and significant response of states to increases in the federal tax rate, resulting in an over-taxation of the common tax base and higher tax rates. Additional tests show that the first model is the most suitable to represent the problem analysed.
关键词：Fiscal federalism ;Tax competition ;Horizontal and vertical tax externalities ;Reaction functions ;Federalismo Fiscal ;Competição Tributária ;Externalidades Horizontal e Vertical ;Funções de Reação
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