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IQ in the Ramsey Model: A Naive Calibration

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  • Garett Jones

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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Bibliographic Info

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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Cited by:
  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.

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