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R&D intensity, firm performance and the identification of the threshold: fresh evidence from the panel threshold regression model[J] . Ming-Liang Yeh,Hsiao-Ping Chu,Peter J. Sher,Yi-Chia Chiu.Applied Economics . 2010 (3)
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The missing link: knowledge diffusion and entrepreneurship in endogenous growth[J] . Pontus Braunerhjelm,Zoltan J. Acs,David B. Audretsch,Bo Carlsson.Small Business Economics . 2010 (2)