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 … determined; research investment and capital are truncated variables, patents are count data and innovative sales are interval …), its market share and diversification, and with the demand pull and technology push indicators. The research effort (R …