Media type: E-Article Title: Patents and Over-Investment in Process Inventions? Comment Contributor: Landau, Daniel L. Published: JSTOR, 1978 Published in: Southern Economic Journal, 45 (1978) 1, Seite 285 Language: Not determined DOI: 10.2307/1057637 ISSN: 0038-4038 Keywords: Economics and Econometrics Origination: Footnote: