Abstract

http://ssrn.com/abstract=896232
 
 

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Citations (60)



 


 



Technological Revolutions and Stock Prices


Lubos Pastor


University of Chicago - Booth School of Business; Centre for Economic Policy Research (CEPR); National Bureau of Economic Research (NBER)

Pietro Veronesi


University of Chicago - Booth School of Business; Centre for Economic Policy Research (CEPR); National Bureau of Economic Research (NBER)

December 2005

CEPR Discussion Paper No. 5428

Abstract:     
During technological revolutions, stock prices of innovative firms tend to exhibit high volatility and bubble-like patterns, which are often attributed to investor irrationality. We develop a general equilibrium model that rationalizes the observed price patterns. The high volatility results from high uncertainty about the average productivity of a new technology. Investors learn about this productivity before deciding whether to adopt the technology on a large scale. For technologies that are ultimately adopted, the nature of uncertainty changes from idiosyncratic to systematic as the adoption becomes more likely; as a result, stock prices fall after an initial run-up. This 'bubble' in stock prices is observable ex post but unpredictable ex ante, and it is most pronounced for technologies characterized by high uncertainty and fast adoption. We examine stock prices in the early days of American railroads, and find evidence consistent with a large-scale adoption of the railroad technology by the late 1850s.

Number of Pages in PDF File: 48

Keywords: Bubble, railroads, technology, innovation

JEL Classification: G1

working papers series


Date posted: April 11, 2006  

Suggested Citation

Pastor, Lubos and Veronesi, Pietro, Technological Revolutions and Stock Prices (December 2005). CEPR Discussion Paper No. 5428. Available at SSRN: http://ssrn.com/abstract=896232

Contact Information

Lubos Pastor (Contact Author)
University of Chicago - Booth School of Business ( email )
5807 S. Woodlawn Avenue
Chicago, IL 60637
United States
773-834-4080 (Phone)
773-702-0458 (Fax)
HOME PAGE: http://www.ChicagoGSB.edu/fac/lubos.pastor/
Centre for Economic Policy Research (CEPR)
77 Bastwick Street
London, EC1V 3PZ
United Kingdom
National Bureau of Economic Research (NBER)
1050 Massachusetts Avenue
Cambridge, MA 02138
United States
Pietro Veronesi
University of Chicago - Booth School of Business ( email )
5807 S. Woodlawn Avenue
Chicago, IL 60637
United States
773-702-6348 (Phone)
773-702-0458 (Fax)
Centre for Economic Policy Research (CEPR)
77 Bastwick Street
London, EC1V 3PZ
United Kingdom
National Bureau of Economic Research (NBER)
1050 Massachusetts Avenue
Cambridge, MA 02138
United States
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