On the Macroeconomic Effects of Major Technological Change

  • Philippe Aghion
  • Peter Howitt


This paper analyses how a General Purpose Technology (GPT) diffuses throughout the various sectors of an economy. The model outlined in this paper can account for a number of empirical observations: in particular, the existence of delays followed by acceleration phases in the experimentation and implementation of a new GPT, and the occurrence of productivity slow-downs and wage inequality increases during the acceleration phase of the logistic diffusion curve.


Arrival Rate Social Learning Real Wage Intermediate Good Wage Inequality 


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  1. Aghion, P., Howitt, P. (1992). — “A Model of Growth through Creative Destruction”, Econometrica. Google Scholar
  2. Atkeson, A., Kehoe, P. (1993). — “Industry Evolution and Transition: The Role of Information Capital”, unpublished, Univ of Pennsylvania.Google Scholar
  3. Cheng, L., Dinopoulos, E. (1992). — “A Schumpeterian Model of Economic Growth and Fluctuations”, Mimeo, University of Florida.Google Scholar
  4. David, P. (1990). — “The Dynamo and the Computer: An Historical Perspective on the Productivity Paradox”, American Economic Review, Vol. 80, 2, pp. 355–361.Google Scholar
  5. Greenwood, J., Yorukoglu, M. (1996). —, M. (1996). — “1974”, unpublished, University of Rochester, 1996.Google Scholar
  6. Helpman, E., Trajtenberg, M. (1994). — “A Time to Sow and a Time to Reap: Growth Based on General Purpose Technologies”, CIAR Working Paper, No 32.Google Scholar
  7. Howitt, P. (1996). — “Measurement, Obsolescence, and the Adjustment to a New General Purpose Technology”, in preparation for this volume.Google Scholar
  8. Jovanovic, B., Rob, R. (1990). — “Long Waves and Short Wave: Growth Through Intensive and Extensive Search”, Econometrica, 58, pp. 1391–1409.CrossRefGoogle Scholar
  9. Juhn, C., Murphy, K., Pierce, B. (1993). — “Wage inequality and the Rise in Returns to Skill”, Journal of Political Economy, 101, No. 3.Google Scholar
  10. Shleifer, A. (1986). — “Implementation Cycles”, Journal of Political Economy. Google Scholar

Copyright information

© Springer Science+Business Media Dordrecht 2000

Authors and Affiliations

  • Philippe Aghion
    • 1
  • Peter Howitt
    • 2
  1. 1.EBRDUniversity College LondonLondonUK
  2. 2.CIAROhio State UniversityUSA

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