For example, if a hurricane is approaching, markets add up individuals' desires for emergency supplies and get the stores to stock those supplies. A market, in the economics sense, is not usually one location, like the Farmers' Market or Wal-Mart. Exchange Sound applet Buyers and sellers make up a market. If the individual has any discretion at all. Buyers and Sellers Sound applet Buyers exchange money for the particular good or service.
Sellers exchange the good or service for money.
People don't buy undifferentiated hospital services. Rather, people buy specific services, like emergency care, OB, heart surgery, etc. But there is no specific market in which all 6 participate. Only the first 3 serve the general public. Only two offer open heart surgery.