The price per unit times the total quantity sold is

According to Friedman's permanent income hypothesis, a family's income can be divided into permanent income and

a. temporary income b. transitory income c. residual income d. extra income e. transitional income

As the definition of products narrows (i.e., becomes more specific), the concentration ratio

A. is not valid. B. tends to increase. C. tends to decrease. D. does not change in any predictable manner.