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The underestimated virtues of the two-sector AK model

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Abstract

We show that the two-sector version of the AK model proposed by Rebelo (1991) can be read as an endogenous growth extension of Greenwood, Hercowitz and Krusell (1997). By confining constant returns to capital to the investment goods sector, the 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. Whereas Jones (1995) criticizes that the one-sector model fails to reconcile the empirical facts of trending real investment rates and stationary output growth, this incompatibility vanishes in the two-sector version. Finally, a simple technological shock can reproduce the ‘1974’ break in post World War II US data. Thus, AK-type endogenous growth models comply much better with empirical evidence, once they are augmented with a strictly concave consumption sector.

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Paper provided by Department of Economics, Johannes Kepler University Linz, Austria in its series Economics working papers with number 2003-15.

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Date of creation: Dec 2003
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Handle: RePEc:jku:econwp:2003_15

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Keywords: AK model; embodiment; endogenous growth; obsolescence; ‘1974’;

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  1. Raouf BOUCEKKINE & Fernando DEL RIO & Omar LICANDRO, 2001. "Obsolescence and Modernization in the Growth Process," Economics Working Papers ECO2001/18, European University Institute.
  2. Hall, Robert E, 1988. "Intertemporal Substitution in Consumption," Journal of Political Economy, University of Chicago Press, vol. 96(2), pages 339-57, April.
  3. Hsieh, Chang-Tai, 2001. "Endogenous growth and obsolescence," Journal of Development Economics, Elsevier, vol. 66(1), pages 153-171, October.
  4. Greenwood, J. & Hercowitz, Z. & Krusell, P., 1996. "Long-Run Implications of Investment-Specific Technological Change," RCER Working Papers 420, University of Rochester - Center for Economic Research (RCER).
  5. Salvador Barrios & Eric Strobl, . "Industry Mobility and Concentration in the European Union," Working Papers 2002-19, FEDEA.
  6. Sergio T. Rebelo, 1990. "Long Run Policy Analysis and Long Run Growth," NBER Working Papers 3325, National Bureau of Economic Research, Inc.
  7. 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.
  8. 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.
  9. Dajin Li, 2002. "Is the AK model still alive? The long-run relation between growth and investment re-examined," Canadian Journal of Economics, Canadian Economics Association, vol. 35(1), pages 92-114, February.
  10. Restuccia, Diego & Urrutia, Carlos, 2001. "Relative prices and investment rates," Journal of Monetary Economics, Elsevier, vol. 47(1), pages 93-121, February.
  11. Masao Ogaki & Carmen M. Reinhart, 1998. "Measuring Intertemporal Substitution: The Role of Durable Goods," Journal of Political Economy, University of Chicago Press, vol. 106(5), pages 1078-1098, October.
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Cited by:
  1. Jorge Duran & Omar Licandro, 2013. "Is the GDP growth rate in NIPA a welfare measure?," 2013 Meeting Papers 191, Society for Economic Dynamics.
  2. Gabriel Felbermayr, 2004. "Specialization on a technologically atagnant aector need not be bad for growth," Economics working papers 2004-02, Department of Economics, Johannes Kepler University Linz, Austria.
  3. Ana Balcao Reis & Joao Ejarque, 2005. "(Relative Price) Lessons from Taking an AK Model to the Data," 2005 Meeting Papers 312, Society for Economic Dynamics.
  4. Juan Prieto & Juan Gabriel Rodríguez & Rafael Salas, . "Polarization, Inequality and Tax Reforms," Working Papers 2003-23, FEDEA.
  5. D'Alessandro, Simone & Salvadori, Neri, 2008. "Pasinetti versus Rebelo: Two different models or just one?," Journal of Economic Behavior & Organization, Elsevier, vol. 65(3-4), pages 547-554, March.
  6. Joao Ejarque & Stephen McKnight, 2006. "Can we identify the relative price between consumption and investment?," Economics Discussion Papers 615, University of Essex, Department of Economics.

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