Media type: E-Article Title: The Role of Invention in U.S. Metropolitan Productivity Contributor: Rothwell, Jonathan T.; Lobo, Jose; Strumsky, Deborah imprint: Elsevier BV, 2012 Published in: SSRN Electronic Journal Language: English DOI: 10.2139/ssrn.2175310 ISSN: 1556-5068 Keywords: Pharmacology (medical) Origination: Footnote: