2021
DOI: 10.1002/cb.1985
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How persistent are duplication of purchase partitions?

Abstract: Brands share more of their customers with bigger competitors and fewer with smaller ones. However, there are occasional deviations to this predictable Duplication of Purchase (DoP) pattern. When two or more brands share excess customers because of functional or nonfunctional differences-it is called a partition. While past research using the NBD-Dirichlet model demonstrates partitions in annual or shorter data, there is no empirical evidence for partition persistency over the longer term, although some other N… Show more

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Cited by 4 publications
(4 citation statements)
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“…However, we believe that brands in our sample share category customers since there is undisputed evidence of customer polygamy with brands in many industries (Ehrenberg et al. , 2004; Dawes, 2016; Anesbury et al. , 2022).…”
Section: Methodsmentioning
confidence: 91%
See 1 more Smart Citation
“…However, we believe that brands in our sample share category customers since there is undisputed evidence of customer polygamy with brands in many industries (Ehrenberg et al. , 2004; Dawes, 2016; Anesbury et al. , 2022).…”
Section: Methodsmentioning
confidence: 91%
“…Despite its popularity, we had to dismiss the use of SCR as a loyalty measure. However, we believe that brands in our sample share category customers since there is undisputed evidence of customer polygamy with brands in many industries (Ehrenberg et al, 2004;Dawes, 2016;Anesbury et al, 2022). Simply, consumers mostly buy from repertoires of several brands in a category (Dawes et al, 2020).…”
Section: Methodsmentioning
confidence: 92%
“…The generalisation is that the brand's size is the dominant factor when determining sharing. Second, an expected level of customer sharing with competitors derives from the law against which actual sharing can be compared (Anesbury et al, 2021; Ehrenberg et al, 2004; Sjostrom et al, 2014; Wilson & Winchester, 2019). Originating from media audience research (e.g., Agostini, 1961; Chatfield & Goodhardt, 1975; Driesener & Rungie, 2022; Goodhardt, 1966; Naami et al, 2021; Winchester & Lees, 2013), the number of viewers that watch any program pair is predicated on the latter program's audience size (Goodhardt & Ehrenberg, 1969).…”
Section: Background and Research Questionsmentioning
confidence: 99%
“…Their presence or absence is the key to our analysis of music choice behaviour and thus understanding it. The Partition Sharing Index (PSI) determines if partition exists (Anesbury et al, 2018(Anesbury et al, , 2021Naami et al, 2021;Sjostrom et al, 2014). PSI shows the level of sharing between two brands, given their size.…”
Section: Testing If 'Brands' Partition From the Rest Of The Marketmentioning
confidence: 99%