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IQ in the Ramsey Model: A Naive Calibration

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Garett Jones

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Abstract

I show that in a conventional Ramsey model, between one-fourth and one-half of the global income distribution can be explained by a single factor: The effect of large, persistent differences in national average IQ on the private marginal product of labor. Thus, differences in national average IQ may be a driving force behind global income inequality. These persistent differences in cognitive ability--which are well-supported in the psychology literature--are likely to be somewhat malleable through better health care, better education, and especially better nutrition in the world’s poorest countries. A simple calibration exercise in the spirit of Bils and Klenow (2000) and Castro (2005) is conducted. I show that an IQ-augmented Ramsey model can explain more than half of the empirical relationship between national average IQ and GDP per worker. I provide evidence that little of the IQ-productivity relationship is likely to be due to reverse causality.

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Paper provided by DEGIT, Dynamics, Economic Growth, and International Trade in its series DEGIT Conference Papers with number c011_063.

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Length: 44 pages JEL Classification:
Date of creation: Jun 2006
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Handle: RePEc:deg:conpap:c011_063

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  3. Jeffrey S. Zax & Daniel I. Rees, 2002. "IQ, Academic Performance, Environment, and Earnings," The Review of Economics and Statistics, MIT Press, vol. 84(4), pages 600-616, 07. [Downloadable!] (restricted)
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  5. Martin Feldstein & Charles Horioka, 1980. "Domestic Savings and International Capital Flows," NBER Working Papers 0310, National Bureau of Economic Research, Inc. [Downloadable!] (restricted)
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  6. Robert J. Barro & Jong-Wha Lee, 1993. "International Comparisons of Educational Attainment," NBER Working Papers 4349, National Bureau of Economic Research, Inc. [Downloadable!] (restricted)
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  7. Stephen L. Parente & Edward C. Prescott, 2004. "A unified theory of the evolution of international income levels," Staff Report 333, Federal Reserve Bank of Minneapolis. [Downloadable!]
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  8. Eric A. Hanushek & Dennis D. Kimko, 2000. "Schooling, Labor-Force Quality, and the Growth of Nations," American Economic Review, American Economic Association, vol. 90(5), pages 1184-1208, December. [Downloadable!] (restricted)
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  10. Daron Acemoglu & Simon Johnson & James A. Robinson, 2001. "The Colonial Origins of Comparative Development: An Empirical Investigation," American Economic Review, American Economic Association, vol. 91(5), pages 1369-1401, December. [Downloadable!] (restricted)
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  11. John T. Warner & Saul Pleeter, 2001. "The Personal Discount Rate: Evidence from Military Downsizing Programs," American Economic Review, American Economic Association, vol. 91(1), pages 33-53, March. [Downloadable!] (restricted)
  12. Kydland, Finn E & Prescott, Edward C, 1982. "Time to Build and Aggregate Fluctuations," Econometrica, Econometric Society, vol. 50(6), pages 1345-70, November. [Downloadable!] (restricted)
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  13. Rui Castro, 2005. "Economic Development and Growth in the World Economy," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 8(1), pages 195-230, January. [Downloadable!] (restricted)
  14. Mankiw, N Gregory & Romer, David & Weil, David N, 1992. "A Contribution to the Empirics of Economic Growth," The Quarterly Journal of Economics, MIT Press, vol. 107(2), pages 407-37, May. [Downloadable!] (restricted)
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  15. Weede, Erich & Kampf, Sebastian, 2002. "The Impact of Intelligence and Institutional Improvements on Economic Growth," Kyklos, Blackwell Publishing, vol. 55(3), pages 361-80.
  16. Neal, Derek A & Johnson, William R, 1996. "The Role of Premarket Factors in Black-White Wage Differences," Journal of Political Economy, University of Chicago Press, vol. 104(5), pages 869-95, October. [Downloadable!] (restricted)
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  17. Bishop, John Hillman, 1989. "Is the Test Score Decline Responsible for the Productivity Growth Decline?," American Economic Review, American Economic Association, vol. 79(1), pages 178-97, March. [Downloadable!] (restricted)
  18. Stephen L. Parente & Edward C. Prescott, 2002. "Barriers to Riches," MIT Press Books, The MIT Press, edition 1, volume 1, number 0262661306.
  19. Garett Jones & W. Joel Schneider, 2004. "Intelligence, Human Capital, and Economic Growth: An Extreme Bounds Analysis," Econometric Society 2004 Latin American Meetings 156, Econometric Society. [Downloadable!]
  20. Samuel Bowles & Herbert Gintis & Melissa Osborne, 2000. "The Determinants of Earnings: Skills, Preferences, and Schooling," Working Papers 2000-07, University of Massachusetts Amherst, Department of Economics. [Downloadable!]
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  1. Garett Jones & W. Joel Schneider, 2005. "Intelligence, Human Capital, and Economic Growth: A Bayesian Averaging of Classical Estimates (BACE) Approach," Development and Comp Systems 0507005, EconWPA. [Downloadable!]
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