Quality Ladders in the Theory of Growth
AbstractThe authors develop a model of repeated product improvements in a continuum of sectors. Each product follows a stochastic progression up a quality ladder. Progress is not uniform across sectors, so an equilibrium distribution of quality evolves over time. But the rate of aggregate growth is constant. The growth rate responds to profit incentives in the R&D sector. The authors explore the welfare properties of the model. Then they relate their approach to an alternative one that views product innovation as a process of generating an ever-expanding range of horizontally differentiated products. Finally, the authors apply the model to issues of resource accumulation and international trade. Copyright 1991 by The Review of Economic Studies Limited.
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Bibliographic InfoArticle provided by Wiley Blackwell in its journal Review of Economic Studies.
Volume (Year): 58 (1991)
Issue (Month): 1 (January)
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Web page: http://www.blackwellpublishing.com/journal.asp?ref=0034-6527
Other versions of this item:
- Gene M. Grossman & Elhanan Helpman, 1989. "Quality Ladders in the Theory of Growth," NBER Working Papers 3099, National Bureau of Economic Research, Inc.
- Grossman, G.M. & Helpman, E., 1989. "Quality Ledders In The Theory Of Growth," Papers 148, Princeton, Woodrow Wilson School - Public and International Affairs.
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