Parts of the content published 2010 in "Happiness and public choice", Public Choice, 144, pp. 557-573, are identical with the 2009 article "Should national happiness be maximized?", published in A.K. Dutt, Happiness, economics and politics: towards a multi-disciplinary approach, pp. 301-323. However, the 2010 article does not refer to the 2009 article.