consumption
Consumption, sometimes commonly known as money, buy things, etc., is unique to human society, refers to the human through the purchase of tangible or intangible goods or services, and from their personal desire to meet. Human consumption may be a whim (such as people passing the restaurant, provoking appetite), and may be accustomed to certain consumption (for example, some families buy newspapers every day), but consumption or purchase involves a very complex decision-making process, The income, personal preferences, social customs, and even around friends, family purchase behavior on the consumer I have an impact. Some of the consumption itself is also an "inevitable" nature, such as the purchase of food to solve the problem of food and clothing; some consumption is optional, such as the purchase of gold and silver jewelry and private cars. If you are buying expensive goods, but also to drive consumers to make goods and substitutes between the comparison, will appear consumer behavior. ...