Weak Patents Are a Weak Deterrent: Patent Portfolios, the Orange Book Listing Standard, and Generic Entry in Pharmaceuticals

C. Scott Hemphill and Bhaven N. Sampat, Standards, Patents and Innovations (International Journal of Industrial Organization, Volume 36, 2012), chap. 10, https://www.nber.org/books-and-chapters/standards-patents-and-innovations/weak-patents-are-weak-deterrent-patent-portfolios-orange-book-listing-standard-and-generic-entry.