Abstract:
The number of people who buy two particular brands in a given time period does not depend on the brands as such but only on the numbers of people who buy each brand and on a general constant. The constant varies by product-field and by the length of the analysis-period, the correlation between buying any two brands being positive in relatively long periods and negative for shorter periods.
This could also be of interest:
Research Papers
An empirical approach to brand-switching (Discussion)
Catalogue: Seminar 1968: Operational Research In Marketing
Author: Andrew S. C. Ehrenberg
 
November 1, 1968
Research Papers
Brand switching models
Catalogue: ESOMAR/WAPOR Congress 1969
Author: Raymond Delbes
 
June 15, 1969
Research Papers
Brand switching models (French)
Catalogue: ESOMAR/WAPOR Congress 1969
Author: Raymond Delbes
 
June 15, 1969
