Warning: file_put_contents(/www/wwwroot/zidian/oumou.cn/cache/1f0caa73ca57f2e988314f71d6fc7231.txt): failed to open stream: No space left on device in /www/wwwroot/zidian/oumou.cn/index.php on line 58 Coelli是什么意思，Coelli的翻译，Coelli音标、读音、用法和例句_欧米惠必应词典
We adopt Battese and Coelli's (1995) model of stochastic frontier function and apply the software Frontier4.1 to evaluate the cost inefficiency score. 研究发现，研发支出与成本效率呈正相关关系，即研发支出越多，成本效率越高。