Abraham M M, Lodish L M
Harv Bus Rev. 1990 May-Jun;68(3):50-1, 53, 56 passim.
Until recently, believing in the effectiveness of advertising and promotion was largely a matter of faith. Despite all the data collected by marketing departments, none measured what was really important: the incremental sales of a product over and above those that would happen without the advertising and promotion. Thanks to a qualitatively new kind of marketing data, that situation is changing. "Single source" data correlate information on actual consumer purchases (available from universal-product-code scanners used in supermarkets and drug-stores) with information on the corresponding television advertising those consumers receive or on the promotion events they see. This allows managers to measure the incremental impact of advertising and promotion and to improve marketing productivity. To take advantage of the new single-source data, however, managers have to throw out much of the conventional wisdom about advertising and promotion that has grown up over the years. They must learn how to evaluate marketing differently by continually examining the appropriate balance between advertising and promotion. They must also train their sales force to do a different and extremely important job: to demonstrate to retailers the consumer pull of the company's advertising and promotion programs, as well as the effect of these programs on retailer profitability.
