“…Finally, processing of price information is a task of high complexity, given the existence of a large number of diverse products that have many different prices. In the context of perception of price changes, it needs to be considered, that even in case of constant overall price levels for certain product categories, there are usually many different and unsystematic price changes within these product categories, for instance due to type of store, season, or discount offers (e.g., Gärling & Gamble, 2008;Gärling, Gamble, & Juliusson, 2007). More technically, there should be a huge variance behind constant overall price levels for a particular product category.…”