Mobility, taxation and welfare

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• 作者：Sami Bibi (1)
  Jean-Yves Duclos (2) (3)
  Abdelkrim Araar (4)
  
• 刊名：Social Choice and Welfare
• 出版年：2014
• 出版时间：March 2014
• 年：2014
• 卷：42
• 期：3
• 页码：503-527
• 全文大小：348 KB
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• 作者单位：Sami Bibi (1)
  Jean-Yves Duclos (2) (3)
  Abdelkrim Araar (4)
  
  1. CIRPéE, Pavillon de Sève, Université Laval, Québec City, QC, G1V 0A6, Canada
  2. Département d’économique and CIRPéE, Université Laval, Québec City, QC GIV 0A6, Canada
  3. Institut d’Análisi Económica(CSIC), Barcelona, Spain
  4. PEP and CIRPéE, Pavillon de Sève, Université Laval, Québec City, QC G1V 0A6, Canada
  
• ISSN：1432-217X

文摘

Income mobility is often thought to equalize permanent incomes and thereby to improve social welfare. The welfare analysis of mobility often fails, however, to account for the cost of the variability of periodic incomes around permanent incomes. This paper assesses the net welfare benefit of mobility by assuming both an aversion to inequality in permanent incomes and an aversion to variability in periodic incomes. The paper further investigates the combined (and comparative) impact of mobility and the tax system (another presumed income equalizer) on the dynamics of income across time and on the inequality of income across individuals. Using panel data, we find that Canada’s tax system limits significantly the redistributive impact of mobility while also lowering considerably the cost of income variability. The permanent income equalizing effect of taxes can reach up to 23?% of mean income at the higher values of inequality aversion that we use. Globally, the net social welfare effect of both mobility and taxation is (almost always) positive and substantial, often amounting to around 30?% of mean income. For all choices of parameter values, the tax effect exceeds substantially the net effect of mobility on inequality and social welfare.