We focus in this study on the exogenous event of the enactment of American Inventor’s Protection Act of 1999 (AIPA), which disseminates timely, detailed, and credible public information on R&D activities through pre-grant patent disclosures. Exploiting the staggered timing of patent...

Using comprehensive patent lawsuit data from 2000 to 2014, we find that a stock portfolio consisting of firms involved in patent lawsuits provides significantly positive stock returns (between 0.56% to 1.02% per month) in the following year. We propose and examine several possible explanations...

Patent valuation is of vital importance. This dissertation develops two patent valuation measures using abnormal stock market returns to patentee firms in time windows around grant and publication, respectively. The methodologies innovatively involve dynamics in the probability of grant, provide...