Media type: E-Article Title: Mega Firms and Recent Trends in the U.S. Innovation: Empirical Evidence from the U.S. Patent Data Contributor: Braguinsky, Serguey; Choi, Joonkyu; Ding, Yuheng; Jo, Karam; Kim, Seula Published: Elsevier BV, 2023 Published in: SSRN Electronic Journal (2023) Language: English DOI: 10.2139/ssrn.4512494 ISSN: 1556-5068 Keywords: Pharmacology (medical) Origination: Footnote: