Browsing by Author "Tran, N. A."

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    Measuring the efficiency of coffee producers in Vietnam: Do outliers matter?
    Tran, N. A. (2007)
    Coffee is one of Vietnam's most valuable exports, earning up to $600 million a year. However, a drop in producer coffee prices in the late 1990s has caused hardship for
  • A new method for detecting outliers in Data Envelopment Analysis
    Tran, N. A.; Shively, Gerald E.; Preckel, P. (Oxford, UK: Routledge, 2008)
    We introduce a simple method for detecting outliers in Data Envelopment Analysis. The method is based on two scalar measures. The first is the relative frequency with which an observation appears in the construction of the frontier when testing the efficiency of other observations, and the second is the cumulative weight of an observation in the construction of the frontier. We provide a link to computer programming code for implementing the procedure.