Costa rica vacations for In this way, innovation in the retail sector starts always with deciding how to satisfy consumer wants better at lower prices, and this can be achieved only at a low level of service. Research on the development of the retail sector in many countries, however, has cast doubt on whether stores always increase service levels and costs. Another explanation, the retail accordion hypothesis, suggests that the pattern of retail evolution has tended to alternate between domination by wide-assortment retailers and domination by narrow-line, specialized retailers. This hypothesis of institutional change implies that both diversification and specialization strategies can succeed under certain circumstances. In the United States, general stores came first; as settlements grew, specialists developed; in the wake of urbanization and of growing incomes, department stores which stocked wide assortments were set up for consumers to satisfy more of their wants at one location and thus save on time. More recently, again, a tendency toretail 713 ward more specialty stores has been noted. Critics of the hypothesis have pointed out that it does not apply to all cases of retail evolution and that is not an explanatory model that lends itself to predictions. Costa rica vacations 2016.