期刊
STATA JOURNAL
卷 12, 期 3, 页码 461-478出版社
SAGE PUBLICATIONS INC
DOI: 10.1177/1536867X1201200309
关键词
st0270; orderalpha; orderm; nonparametric; efficiency; partial frontier; free disposal hull; outlier-robust; decision-making unit
资金
- Collaborative Research Center Statistical Modelling of Nonlinear Dynamic Processes of the German Research Foundation (DFG) [SFB 823]
Despite their frequent use in applied work, nonparametric approaches to efficiency analysis-namely, data envelopment analysis and free disposal hull-have had reputations among econometricians. This is mainly because data envelopment analysis and free disposal hull represent deterministic approaches that are highly sensitive to outliers and measurement errors. However, so-called partial frontier approaches have recently been developed, namely, order-m and order-alpha. These approaches generalize free disposal hull by allowing for superefficient observations to be located beyond the estimated production-possibility frontier. Although these methods are also purely nonparametric, the sensitivity to outliers is substantially reduced by partial frontier approaches enveloping just a subsample of observations. In this article, I introduce the new Stata commands orderm and orderalpha, which implement order-m, order-alpha, and free disposal hull efficiency analysis in Stata. The commands allow for several options, such as statistical inference based on subsampling bootstrapping.
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