C04-6 Richard A. Easterlin, Diminishing Marginal Utility of Income (forthcoming in Social Indicators Research 2004).
C04-7 Richard A. Easterlin, Explaining Happiness (Proceedings of the National Academy of Sciences, 100:19, 11176-11183, copyright September 16, 2003, National Academy of Sciences, U.S.A.
C04-9 Richard A. Easterlin, Feeding the Illusion of Growth and Happiness: A Reply to Hagerty and Veenhoven (forthcoming in Social Indicators Research 2004).