The so-called market segmentation, as if in a particular place to draw a range, so, all the goods in this range will become different, "expensive" is one of its characteristics.
In fact, friends who understand economics know that catering food belongs to the competitive commodities, because in the case of branding, visibility and other factors aside, if a restaurant dishes are too expensive, people will choose to other hotels to consume; and we live in the choice of restaurants is too much, can not be counted clearly, and because of this, it is difficult for any restaurant to do both sell high-priced meals, and recruit a lot of customers. The first thing you need to do is to get your hands on a new one, and you'll be able to do that.
However, once these restaurants enter the airport, the situation is different. This is because the airport is a relatively closed place, where the airport often monopolizes the right to operate.
At this point, although the hotels in the airport are still providing "competitive goods", but because the airport is a monopoly, so these "competitive goods" will become "monopoly goods. So, these "competitive goods" have become "monopolized goods". According to the interpretation of economics, monopolization will lead to high prices of goods, and it will make consumers suffer by depriving them of the right to choose and bargaining power. Of course, in practice, the Government will often intervene in accordance with the law and will not allow the prices of goods in these establishments to be too outrageous, so as to protect the rights and interests of consumers.