Stephan, Paula; Gurmu, Shiferaw; Sumell, Albert; Black, … - In: Economics of Innovation and New Technology 16 (2007) 2, pp. 71-99
patent equation, using instruments for the number of articles to avoid problems of endogeneity. We also estimate the patent … context and field to be important predictors of the number of patent applications. We also find patents to be positively and …