Gupta, Sunil. "Impact of Sales Promotions on When, What, and How Much to Buy." Journal of Marketing Research (JMR) 25 (November 1988): 342–355. (Winner of William F. O'Dell Award For the Journal of ...
Buzzell, Professor of Marketing at Harvard Business School. Again, the PIMS database was used ... and on which we had both advertising and promotion spending data. Sales promotion, as defined in PIMS, ...
Gupta, Sunil. "Reflections on 'Impact of Sales Promotions on When, What, and How Much to Buy'." Journal of Marketing Research (JMR) 30 (November 1993): 522–524.