PL EN


2010 | 20 | 3-4 | 41-52
Article title

Heterogeneity in models of purchase frequency. A comparison of Poisson-gamma mixtures with finite Poisson mixtures

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Languages of publication
EN
Abstracts
EN
Poisson models are fundamental in the modelling of purchase frequencies. However, very often they are statistically incompatible with the data. This stems from the fact that the mean is assumed to be equal to the variance and, in consequence, this fails to capture heterogeneity. Thus Poisson mixture models are often considered instead. The most commonly used of these models is the Poisson-gamma mixture model, which is very often applied to problems in marketing. Hence, it would be advisable to discover its limitations. Using real marketing data sets, we point out the limitations of this approach. Furthermore, we compare it with finite Poisson mixtures.
Year
Volume
20
Issue
3-4
Pages
41-52
Physical description
Contributors
  • Institute of Organization and Management, Wrocław University of Technology, Smoluchowskiego 25, 50-372 Wrocław, Poland
References
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.desklight-da9e55ae-7568-497c-9dcb-a0de3fcacdb1
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