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Patterns of Comovement: The Role of Information Technology in the U.S. Economy

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Author Info
Hyunbae Chun
Jung-Wook Kim
Jason Lee
Randall Morck

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Abstract

Firm-specific variation in stock returns and fundamental performance measures is significantly higher in industries that have a history of more investment in information technology (IT). We hypothesise that IT is associated with creative destruction or product differentiation, either of which can widen the performance difference between winner and loser firms. Thus, economy-level volatility can fall while firm-level volatility rises because firm-specific volatility cancels out in the aggregate. Our results are consistent with rising firm-specific variation in US stocks reflecting a rising pace of creative destruction; and with greater firm-specific variation in richer and faster growing countries reflecting more intensive creative destruction in those economies, though other explanations are probably valid as well.

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Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number 10937.

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Date of creation: Nov 2004
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Handle: RePEc:nbr:nberwo:10937

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Find related papers by JEL classification:
G0 - Financial Economics - - General
E3 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles
O3 - Economic Development, Technological Change, and Growth - - Technological Change
O4 - Economic Development, Technological Change, and Growth - - Economic Growth and Aggregate Productivity

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Cited by:
(explanations, Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.)

  1. Diego Comin & Thomas Philippon, 2005. "The Rise in Firm-Level Volatility: Causes and Consequences," NBER Working Papers 11388, National Bureau of Economic Research, Inc. [Downloadable!] (restricted)
  2. F. Owen Irvine & Scott Schuh, 2005. "The roles of comovement and inventory investment in the reduction of output volatility," Working Papers 05-9, Federal Reserve Bank of Boston. [Downloadable!]
  3. Owen Irvine & Scott Schuh, 2007. "The roles of comovement and inventory investment in the reduction of output volatility," Proceedings, Federal Reserve Bank of San Francisco, issue Nov. [Downloadable!]
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