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Scoring customers with regard to the expected number of their future transactions is of fundamental interest to direct marketers. For the purpose of customer scoring, a variety of models have been developed, based on the negative binomial distribution. Extensions of such models allow for customer defection (" buy until you die "). We extend customer scoring(More)
This paper compares three different models of efficiency measurement on the basis of multiple inputs and outputs. Various data envelopment models are compared with principle component analysis and with a naïve model that derives a single efficiency score for every unit by averaging all possible output-input ratios. The data set for this comparison consists(More)
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