"Policy makers around the world are increasingly worried about developments in some digital markets and in particular digital platforms which use business practices to obtain an advantage vis-à-vis competitors in vertically related activities (e.g., self-preferencing) or which use their...

Consider a differentiated product market in which all consumers are fully informed about match value and price at the time they make their purchasing decision. Initially, consumers become informed about the prices of all products in the market but do not know the match values. Some consumers...