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Systematic review and meta-regression analysis of technical efficiency in dairy farms

机译：奶牛场技术效率的系统评价和元回归分析

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摘要

Purpose - The purpose of this paper is to complement and extend previous literature reviews on Technical Efficiency (TE) in dairy farms, analysing the effects of different methodologies and study-specific characteristics on Mean TE (MTE). Design/methodology/approach - The researchers independently conducted a systematic review of more than 400 abstracts and 85 full-text papers. Original keywords were applied to seven key electronic databases. Results from a meta-regression analysis of 85 published papers totalling 443 TE distributions in dairy farms worldwide are discussed. Findings - The variation in the MTE indexes reported in the literature can be explained by the methodology of estimations (method of estimation, functional form of frontier models, model dimensionality), the farms geographical location and farm size. Additionally, the results suggest that, given the state of technology prevailing in each country at the time that the studies on TE were conducted, dairy farmers in the sample could increase milk output by 20.9 per cent (level of inefficiency), on average, if they produce on their frontiers. Originality/value - This study makes two important contributions: first, it updates and compares previous works on frontier estimation of TE in dairy farms; and second, it adds two dimensions of dairy farms, size (herd and land area) and economic development, to the known differentials of TE measurement.
机译：目的-本文的目的是补充和扩展以往关于奶牛场技术效率（TE）的文献综述，分析不同方法和研究特定特征对平均TE（MTE）的影响。设计/方法/方法-研究人员独立地对400多种摘要和85篇全文发表了系统的综述。原始关键字已应用于七个关键电子数据库。讨论了对全球奶牛场中85篇已发表论文的总数进行443 TE分布的荟萃回归分析的结果。调查结果-文献中报道的MTE指数的变化可以通过估算方法（估算方法，边界模型的功能形式，模型维数），农场地理位置和农场规模来解释。此外，结果表明，考虑到在进行TE研究时每个国家的技术水平都很高，如果满足以下条件，样本中的奶农平均可将牛奶产量提高20.9％（低效率水平）。他们在边疆生产。原创性/价值-这项研究做出了两个重要贡献：第一，它更新和比较了以前关于奶牛场TE边界估计的工作；其次，它在已知的TE测量差异上增加了奶牛场的两个维度，即规模（牧场和土地面积）和经济发展。

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