Hall, Bronwyn H; Thoma, Grid L. D.; Torrisi, Salvatore - National Bureau of Economic Research (NBER) - 2007
This paper provides novel empirical evidence on the private value of patents and R&D in European firms during the period 1991-2004. We explore the relationship between firm's stock market value, patents, and "quality"-weighted patents issued by the European Patent Office (EPO) and the US Patent...