Hoffmann, Angela; Loy, Jens-Peter - In: German Journal of Agricultural Economics (GJAE) 59 (2010) 4, pp. 225-245
German food retailing is characterized by a strong price competition. Thus, we would expect the law of one price to hold and price adjustments to occur simultaneously. However, significant price differences can be observed which are often caused by sales. As price promotions are not related to...