有交换“东西”的地方,就有市场。这“东西”可能是一袋土豆,一台洗衣机,或一所房子。在所有这些情况下,购买什么和对它付款两者之间有直接联系。但是这“东西”,也可能是堆垃圾,一付新义齿,国民教育,医疗保健,或一颗原子弹。所有这些,都或多或少地由集体供给资金。一个人购买奶酪称为顾客,在他需要社会福利事业时,就称为“用户”;对商品的需要和社会 Where there is an exchange of “things”, there is a market. This “stuff” may be a bag of potatoes, a washing machine, or a house. In all these cases, there is a direct link between what to buy and what to pay for it. But this “stuff” may also be garbage, a new denture, national education, health care, or an atomic bomb. All of these are more or less collectively funded. A person buying cheese is called a customer. When he needs a social welfare service, he is called a “user”; the demand for goods and the society