what is a main difference between a concentrated retail system and a fragmented retail system? multiple choice market share is indistinct in a concentrated retail system; market share is distinct in a fragmented retail system. a concentrated retail system is common in underdeveloped countries; fragmented retail systems are common in developed nations. a few retailers supply most of the market in a concentrated system; many retailers are present in a fragmented system. large retail establishments prefer a fragmented system; smaller players prefer a concentrated system.