It is appropriate to use the supply-and-demand model in which of the following markets?

Drivers are charged a price to use a tollway. But even tollways, such as the Tri-State Tollway near Chicago, become heavily congested during the morning and evening rush hours. Thus,

A) the rush hour represents a surplus of cars. B) your textbook author is wrong in claiming congestion is caused by zero prices. C) higher tolls are required during rush hours to reduce congestion. D) growing population is indeed the problem.

This statement is true. The Producer Price Index (PPI) is based on prices paid for supplies and inputs by producers of goods and services. The PPI in general has increase over time representing that the cost of living has increased over time.

a. Consumer Price Index b. Product Price Index c. Employment Cost Index d. Employment Price Index