Media type: E-Article Title: First Movers and Follow-on Invention: Evidence from a Vector Space Model of Invention Contributor: Younge, Kenneth A.; Kuhn, Jeffrey M. Published: Elsevier BV, 2019 Published in: SSRN Electronic Journal (2019) Language: English DOI: 10.2139/ssrn.3354530 ISSN: 1556-5068 Keywords: Pharmacology (medical) Origination: Footnote: