Huelva 17 th and 18 th November 2008 – II Workshop on Entrepreneurship Statistics 8 Y= F (X, K, R,  ) Y= output variable X= standard input variables (human capital, physical capital, materials) K= R&D input variable o technological knowledge (R&D investment) R= Environmental characteristics (market and region) PAT i = F(internal structure –size,ownership and control Structure-, environmental vars -market and region-, innovation inputs) Methodology Knowledge Production Function Griliches (1979, 1986) [Pakes and Griliches, 84; Hausman et al, 84; Acs and Audretsch, 88; among others]
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