Market share models for weekly store-level data are useful to understand competitive structures by delivering own and cross price elasticities. These models can however not be used to examine which brands lose share to which brands during a specific period of time. It is for this purpose that we propose a new model, which does allow for such an examination. We illustrate the model for two product categories in two markets, and we show that our model has validity in terms of both in-sample fit and out-of-sample forecasting. We also demonstrate how our model can be used to decompose own and cross price elasticities to get additional insights into the competitive structure.

Additional Metadata
Keywords competitive structure, elasticity decomposition, market shares, share-switching, store-level scanner data
JEL Business Administration and Business Economics; Marketing; Accounting (jel M), Marketing (jel M31)
Persistent URL
Series Tinbergen Institute Discussion Paper Series , ERIM Report Series Research in Management
Journal Discussion paper / Tinbergen Institute
van Oest, R.D, & Franses, Ph.H.B.F. (2003). Which brands gain share from which brands? Inference from store-level scanner data (No. ERS-2003-076-MKT). Discussion paper / Tinbergen Institute. Retrieved from