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The Underestimated Virtues of the Two-sector AK Model

  • Felbermayr Gabriel J

    ()

    (University of Tuebingen)

  • Licandro Omar

    ()

    (European University Institute)

This paper analyzes some unnoticed predictions of the two-sector AK model in line with the recent literature on embodied technical change. Firstly, by confining constant returns to capital to the investment sector, the AK model generates endogenously the secular downward trend of the relative price of equipment investment and the rising real investment rate observed in US NIPA data. Secondly, Jones' (1995) claim that the AK model fails to reconcile the empirical facts of trending real investment rates and stationary output growth vanishes in the two-sector version. Thirdly, consistent with the evidence from cross-country studies, the model predicts a negative relation between GDP per capita and the relative price of equipment. Hence, in spite of its overly simplistic structure, the two-sector AK model provides important intuition on the implications of a trending relative price of equipment investment in endogenous growth environments.

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Article provided by De Gruyter in its journal The B.E. Journal of Macroeconomics.

Volume (Year): 5 (2005)
Issue (Month): 1 (September)
Pages: 1-19

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Handle: RePEc:bpj:bejmac:v:contributions.5:y:2005:i:1:n:9
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  1. Greenwood, J. & Hercowitz, Z. & Krusell, P., 1995. "Long-Run Implications of Investment-Specific Technological Change," UWO Department of Economics Working Papers 9510, University of Western Ontario, Department of Economics.
  2. Sharon G. Harrison, 2003. "Returns to Scale and Externalities in the Consumption and Investment Sectors," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 6(4), pages 963-976, October.
  3. Ogaki, M & Reinhart, C-M, 1995. "Measuring Intertemporal Substitution : The Role of Durable Goods," RCER Working Papers 404, University of Rochester - Center for Economic Research (RCER).
  4. Hall, Robert E, 1988. "Intertemporal Substitution in Consumption," Journal of Political Economy, University of Chicago Press, vol. 96(2), pages 339-57, April.
  5. Jones, Charles I, 1995. "Time Series Tests of Endogenous Growth Models," The Quarterly Journal of Economics, MIT Press, vol. 110(2), pages 495-525, May.
  6. Restuccia, Diego & Urrutia, Carlos, 2001. "Relative prices and investment rates," Journal of Monetary Economics, Elsevier, vol. 47(1), pages 93-121, February.
  7. Sergio T. Rebelo, 1990. "Long Run Policy Analysis and Long Run Growth," NBER Working Papers 3325, National Bureau of Economic Research, Inc.
  8. Hsieh, Chang-Tai, 2001. "Endogenous growth and obsolescence," Journal of Development Economics, Elsevier, vol. 66(1), pages 153-171, October.
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