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考虑环境影响的三阶段组合效率测度模型的改进及在研发效率测度中的应用 被引量:14

An enhanced hybrid three-stage model to account for environment effects in measuring efficiency with an application to R&D efficiency
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摘要 在比较现有考虑环境因素或/与统计噪音的三阶段组合效率测度模型的基础上,通过引入满足平移不变性的幅度调整测度(RAM)模型与Tobit回归相组合,构建了一个灵活的、无需强制性正向调整环境因素差异性影响的三阶段组合效率测度改进模型——RAM-Tobit-RAM.相对现有模型,改进的组合模型充分利用了RAM模型非径向与非定向测度特点,同时从投入与产出两个方向全面考虑径向与非径向松弛;更为重要的是,充分借助RAM模型平移不变性的优点克服了现有组合模型需借助最值强制性正向转化调整后的投入或/和产出以处理非正值的不足,降低效率估计的偏误.实证研究部分借助这一组合分析程序比较分析了中国省域研发效率. A flexible hybrid three-stage model for efficiency measures, RAM-Tobit-RAM, without arbitrarypositive adjustment of the difference of environment effects is proposed by combining rang adjusted measure(RAM) model satisfying translation invariance with Tobit regression, which is based on the discussionsand reviews of extant hybrid three-stage models for removing the differential effects in environment factorsand/or of statistical noise. In contrast to the existing models, our proposing hybrid model takes advantageof RAM model with no-radical and no-oriented measures which can simultaneously presents radical andnon-radical slacks on both inputs and outputs. More important, our model takes full advantage of thetranslation invariance of RAM model to deal with the non-positive values, which only can work for existingmodels by arbitrary positive transformation of adjusted inputs or/and outputs in virtue of maximum orminimum but with biased efficiency estimation. In the empirical study, this article applies this new modelto measure and compare the research and development efficiency of China's provinces.
出处 《系统工程理论与实践》 EI CSSCI CSCD 北大核心 2014年第7期1811-1821,共11页 Systems Engineering-Theory & Practice
基金 国家自然科学基金青年科学基金项目(71103173) 国家软科学研究计划面上项目(2013GXS4B087)
关键词 效率测度组合建模 数据包络分析(DEA) 幅度调整测度(RAM) TOBIT回归 中国省域研发效率 hybrid modeling for efficiency measure data envelopment analysis (DEA) range-adjustedmeasure (RAM) Tobit regression China's provincial R&=D efficiency
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