Crepon, Bruno; Duguet, Emmanuel; Mairesse, Jacques - In: Economics of Innovation and New Technology 7 (1998) 2, pp. 115-158
features: (i) A structural model that explains productivity by innovation output, and innovation output by research investment … being strictly proportional to size). The firm innovation output, as measured by patent numbers or innovative sales, rises …This paper studies the links between productivity, innovation and research at the firm level. We introduce three new …