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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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Innovative R&D and optimal investment under uncertainty in high-tech industries: An implication for emerging economies[J] . Yingyi Tsai,Justin Yifu Lin,Lucia Kurekova.Research Policy . 2009 (8)