%0 Report %A Oswald, Andrew J. %T On the Common Claim that Happiness Equations Demonstrate Diminishing Marginal Utility of Income %D 2005 %8 2005 Sep %I Institute of Labor Economics (IZA) %C Bonn %7 IZA Discussion Paper %N 1781 %U https://www.iza.org/index.php/publications/dp1781 %X It is commonly claimed in the recent happiness literature in psychology and economics that we have proved diminishing marginal utility of income. This paper suggests that we have not. It draws a distinction between concavity of the utility function and concavity of the reporting function. %K happiness %K money %K marginal utility %K curvature %K concave