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Stock Price Volatility and Patent Citation Dynamics: the case of the pharmaceutical industry

Mazzucato, Mariana and Tancioni, Massimiliano (2008). Stock Price Volatility and Patent Citation Dynamics: the case of the pharmaceutical industry. INNOGEN.

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Recent finance literature highlights the role of technological change in increasing firm specific and aggregate stock price volatility (Campbell et al. 2001, Shiller 2000, Pastor and Veronesi 2005). Yet innovation data is not used in these analyses, leaving the direct relationship between innovation and volatility untested. Our aim is to investigate more closely the relationship between stock price volatility and innovation using firm level patent citation data. The analysis builds on the empirical work by Mazzucato (2002; 2003) where it is found that stock price volatility is highest during periods in the industry life-cycle when innovation is the most '˜competence-destroying'. Here we ask whether firms which invest more in innovation (more R&D and more patents) and/or which have '˜more important' innovations (patents with more citations) experience more volatility. We focus the analysis on firms in the pharmaceutical and biotechnology industries between 1974 and 1999. Results suggest that there is a positive and significant relationship between idiosyncratic risk, R&D intensity and the various patent related measures. Preliminary support is also found for the '˜rational bubble' hypothesis linking both the level and volatility of stock prices to innovation.

Item Type: Other
Copyright Holders: 2009 ESRC Genomics Network
Project Funding Details:
Funded Project NameProject IDFunding Body
Innogen CentreNot SetESRC (Economic and Social Research Council)
Not SetNot SetDIME Network of Excellence
Not SetNot SetBritish Academy Grant
Academic Unit/School: Faculty of Arts and Social Sciences (FASS) > Politics, Philosophy, Economics, Development, Geography
Faculty of Arts and Social Sciences (FASS)
Item ID: 28548
Depositing User: Alessandro Taffetani
Date Deposited: 10 May 2011 13:12
Last Modified: 02 May 2018 13:29
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