Trade publications in the food, advertising, and promotional marketing industries were also searched to identify articles on the effects of sales promotions. The search terms used were“sales promotions”,“point- of-purchase”, “trade promotions”, and “price promo- tions”. Due to the large number of hits, the search was restricted to the following key publications: Advertising Age, Campaign, Brandweek, Promo, Promotions and Incentives, and In-Store between the years 2000 and 2008.