For example, with the development of supermarkets, some companies can monopolize the market. The customer can pay more money for the same things as before and this infringes on the customers' rights. With market monopoly, certain types of goods may lose the retail outlet and then disappear (New Statesman, 2003). However, large supermarket chains cannot monopolize the market because there are so many companies competing around the world. For example, in the United Kingdom, many local supermarket chains compete, such as Tesco, Waitrose and Marks & Spencer. Besides these local companies, there are still a few foreign companies like Metro and Walmart. Different companies can become dominant in different areas, such as Walmart in Latin, North and Central America, while Tesco and Carrefour in Europe (Esteban, Luciano, & Daniel, 2014). And in the study, the authors show us the struggle and competition between Walmart and Super Selectos (a local food retail chain from El Salvador). In 2003, Walmart expressed its intention to purchase the Calleja Group, owner of Super Selectos and eager to enter the Salvadoran market. But the Calleja Group has decided to fight against this situation. They imported new store layouts and a new system to expand their market. In the following years, they fought with Walmark and achieved the success necessary to maintain their status in the Salvadoran market. There are therefore too many competitions