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Boston University School of Law

Event study

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Full-Text Articles in Law

Trends In Private Patent Costs And Rents For Publicly-Traded United States Firms, James Bessen, Peter Neuhausler, John L. Turner, Jonathan Williams May 2018

Trends In Private Patent Costs And Rents For Publicly-Traded United States Firms, James Bessen, Peter Neuhausler, John L. Turner, Jonathan Williams

Faculty Scholarship

We use detailed data to estimate the private costs and private rents of United States patents for publicly-traded firms. In analyzing costs, we first introduce a novel theoretical model to interpret our estimates. We then combine lawsuit data from Derwent Litalert with non-practicing entity (NPE) lawsuits collected by Patent Freedom, and use an event-study approach to estimate losses suffered by alleged infringers during 1984-2009. To estimate rents, we combine patent data from the USPTO and EPO with financial data from COMPUSTAT, and use market-value regressions to estimate the value of patent rents for publicly-traded US firms during 1979-2002. We find …


Does The Quality Of The Plaintiffs' Law Firm Matter In Deal Litigation?, David H. Webber, Adam B. Badawi Jan 2015

Does The Quality Of The Plaintiffs' Law Firm Matter In Deal Litigation?, David H. Webber, Adam B. Badawi

Faculty Scholarship

This Article examines how the stock market reacts to the filing of lawsuits against mergers and acquisitions targets as the quality of the plaintiffs’ law firm varies. Our primary dataset includes all cases of this type filed in the Delaware Chancery Court from November 2003–September 2008. We group the law firms that file these suits into higher and lower quality categories using several quantitative and qualitative measures. We hypothesize that target firm share value should reflect the likelihood that litigation will result in an increase in merger consideration. This effect is likely to depend, at least in part, on law …