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Technology Innovation and Diffusion as Sources of Output and Asset Price Fluctuations

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Author Info
Diego A. Comin
Mark Gertler
Ana Maria Santacreu

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Abstract

We develop a model in which innovations in an economy’s growth potential are an important driving force of the business cycle. The framework shares the emphasis of the recent "new shock" literature on revisions of beliefs about the future as a source of fluctuations, but differs by tieing these beliefs to fundamentals of the evolution of the technology frontier. An important feature of the model is that the process of moving to the frontier involves costly technology adoption. In this way, news of improved growth potential has a positive effect on current hours. As we show, the model also has reasonable implications for stock prices. We estimate our model for data post-1984 and show that the innovations shock accounts for nearly a third of the variation in output at business cycle frequencies. The estimated model also accounts reasonably well for the large gyration in stock prices over this period. Finally, the endogenous adoption mechanism plays a significant role in amplifying other shocks.

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Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number 15029.

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Date of creation: Jun 2009
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Handle: RePEc:nbr:nberwo:15029

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E2 - Macroeconomics and Monetary Economics - - Macroeconomics: Consumption, Saving, Production, Employment, and Investment
E3 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles

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This page was last updated on 2009-11-21.

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