9Antonelli C. A failure-inducement model of research and development expenditure:Italian evidence from the early 1980s. Journal of Eco- nomic Behavior & Organization, 1998 ( 2 ) : 159 - 180.
10Chan L K C, Lakonishok J, Sougiannis T. The stock market valuation of research and development expenditures. The Journal of Finance, 2001 (6) :2431 -2456.