Western classical consumer theory, whether Keynesian absolute income hypothesis, Duesenberry's relative income hypothesis, or the life cycle hypothesis of Modigliani and Milton Friedman's permanent income hypothesis, each consumer demand theory emphasizes the decisive role of the income of the consu

In the western classic consumer theory, and whether it is the Cairns of the absolute income hypothesis, or Duma, Addis Ababa, the relative income hypothesis, or a country, the life-cycle hypothesis, as well as Friedman's lasting income hypothesis, each of these consumer demand theory is to emphasize

In the classical theory of consumption in the West, regardless of the absolute income hypothesis of Keynes, is also the relative income hypothesis of James s. Duesenberry, or life-cycle hypothesis of Modigliani-Miller theorem, and Milton Friedman's Permanent income hypothesis, every kind of consumer