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We adopt Battese and Coelli's (1995) model of stochastic frontier function and apply the software Frontier4.1 to evaluate the cost inefficiency score. 研究發(fā)現(xiàn)，研發(fā)支出與成本效率呈正相關(guān)關(guān)系，即研發(fā)支出越多，成本效率越高。