Concavity of Utility, Concavity of Welfare, and Redistribution of Income

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Concavity of Utility, Concavity of Welfare, and Redistribution of Income

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Title: Concavity of Utility, Concavity of Welfare, and Redistribution of Income
Author: Kaplow, Louis
Citation: Louis Kaplow, Concavity of Utility, Concavity of Welfare, and Redistribution of Income, 17 Int'l Tax & Pub. Fin. 25 (2010).
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Abstract: The marginal social value of income redistribution is understood to depend on both the concavity of individuals’ utility functions and the concavity of the social welfare function. In the pertinent literatures, notably on optimal income taxation and on normative inequality measurement, it seems to be accepted that the role of these two sources of concavity is symmetric with regard to the social concern about inequality in the distribution of income. Direct examination of the question, however, reveals that this is not the case. Concavity of utility has a simple, direct effect on the marginal social value of redistribution, as might be expected, whereas concavity of the social welfare function has a more subtle influence, one that in some cases may not be very significant. The implications of this difference are examined for some standard forms of utility and welfare functions, including particular versions that appear in the optimal income taxation literature.
Published Version: http://link.springer.com/article/10.1007%2Fs10797-008-9097-5#page-1
Other Sources: http://lsr.nellco.org/cgi/viewcontent.cgi?article=1225&context=harvard_olin
http://www.nber.org/papers/w10005.pdf?new_window=1
http://papers.ssrn.com/sol3/papers.cfm?abstract_id=463241
Terms of Use: This article is made available under the terms and conditions applicable to Open Access Policy Articles, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#OAP
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:12027853
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