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  • 1 School of Economics and Geary Institute, University College Dublin, Dublin, USA
  • 2 School of Economics, UCD, Belfield, Dublin 4, Ireland
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Abstract

Kanazawa (2007) offers an explanation for the variation across countries of average intelligence. It is based on the idea that human intelligence is a domain specific adaptation and that both temperature and the distance from some putative point of origin are proxies for the degree of novelty that humans in a country have experienced. However, the argument ignores many other considerations and is a priori weak and the data used questionable. A particular problem is that in calculating distances between countries it implicitly assumes that the earth is flat. This makes all the estimates biased and unreliable.

  • S.M. Barnett W. Williams 2004 National intelligence and the Emperors New Clothes Contemporary Psychology: APA Review of Books 49 4 389 396.

    • Search Google Scholar
    • Export Citation
  • D. Borsboom 2006 The attack of the psychometricians Psychometrika 71 3 425 440.

  • J. Bound C. Brown N. Mathiowetz 2001 Measurement Error in Survey Data J. J. Heckman E. Leamer Handbook of Econometrics, vol 5. Handbooks in Economics Elsevier Science Amsterdam 3705 3843.

    • Search Google Scholar
    • Export Citation
  • T.E. Dickins R. Sear A.J. Wells 2007 Mind the gap(s)…in theory, method and data: Reexamining Kanazawa (2006) British Journal of Health Psychology 12 167 178.

    • Search Google Scholar
    • Export Citation
  • G.T.H. Ellison 2007 Health, wealth and IQ in sub-Saharan Africa: Challenges facing the ‘savanna Principle’ as an explanation for global inequalities in Health British Journal of Health Psychology 12 191 228.

    • Search Google Scholar
    • Export Citation
  • R.P. Feynman 1997 Surely you're joking Mr Feynman! W.W. Norton & Co. New York.

  • W. Greene 2007 Econometric Analysis 6 Prentice-Hall Upper Saddle River.

  • S. Kanazawa 2008 Temperature and evolutionary novelty as forces behind the evolution of general intelligence Intelligence 36 99 108.

  • R. Lynn T. Vanhanen 2002 IQ and the wealth of nations Praeger Westport.

  • R. Lynn T. Vanhanen 2006 IQ and Global Inequality Washington Summit Publishers Augusta, GA.

  • U. Neisser G. Boodoo T.J. Bouchard Jr. A.W. Boykin N. Brody S.J. Ceci D.F. Halpern J.C. Loehlin R. Perloff R.J. Sternberg S. Urbina 1996 Intelligence: Knowns and unknowns American Psychologist 51 77 101.

    • Search Google Scholar
    • Export Citation
  • T. Nychba 2004 Review of IQ and the wealth of the nations Journal of Economic Literature 42 220 221.

  • M.H. Wolpoff 1996 Human evolution McGraw Hill New York.

  • M.H. Wolpoff 2005 Multiregional evolution C. Renfew P. Bahns Archaeology: the key concepts Routledge London.

  • E. Zeidler 2004 Oxford Users Guide to Mathematics Oxford University Press Oxford.