Ramaswamy, Venkatram; Desarbo, Wayne S.; Reibstein, David J. - In: Marketing Science 12 (1993) 1, pp. 103-124
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...