1. Computer and Communications; (3) Drugs and Medical;Chemical (excluding Drugs
2. But see David S. Abrams et al., Patent Value and Citations: Creative Destruction or Strategic Disruption?;Other;The NBER Patent Citations Data File: Lessons, Insights, and Methodological Tools,2001
3. finding an unobserved heterogeneity in the rate of patent citations because forward citations to a patent may beget more forward citations). 202. The number of forward citations to a patent by later-issued U.S. patents (as of July 2014) is included in the "Referenced By" portion of each patent's page on Google Patents. See generally Patents;Alan C Marco;The Dynamics of Patent Citations, 94 ECON. LETTERS,2007
4. mpirical studies of judicial decisions suffer from significant limitations;See William;Judicial Opinions Involving Health Insurance Coverage: Trompe L'oeil or Window on the World?, 31 IND. L. REV,1998