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An Empirical Pooling Approach for Estimating Marketing Mix Elasticities with PIMS Data

Author

Listed:
  • Venkatram Ramaswamy

    (University of Michigan)

  • Wayne S. Desarbo

    (University of Michigan)

  • David J. Reibstein

    (The Wharton School, University of Pennsylvania)

  • William T. Robinson

    (University of Michigan)

Abstract

The PIMS (Profit Impact of Marketing Strategies) data entail sparse time-series observations for a large number of strategic business units (SBUs), In order to estimate disaggregate marketing mix elasticities of demand, a natural solution is to pool different SBUs. The traditional, a priori approach is to pool together those SBUs which one believes in advance to be very similar with respect to their marketing mix elasticities. We propose an alternative maximum likelihood, latent-pooling method for simultaneously pooling, estimating, and testing linear regression models . This method enables the determination of a “fuzzy” pooling scheme, while directly estimating a set of marketing mix elasticities and intertemporal covariances for each pool of SBUs. Our analyses reveal different magnitudes and patterns of marketing mix elasticities for the derived pools. Pool membership is influenced by demand characteristics, business scope, and order of market entry.

Suggested Citation

  • Venkatram Ramaswamy & Wayne S. Desarbo & David J. Reibstein & William T. Robinson, 1993. "An Empirical Pooling Approach for Estimating Marketing Mix Elasticities with PIMS Data," Marketing Science, INFORMS, vol. 12(1), pages 103-124.
    • Handle: RePEc:inm:ormksc:v:12:y:1993:i:1:p:103-124
    DOI: 10.1287/mksc.12.1.103
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