The accompanying diagram shows data from the U.S. Bureau of Labor Statistics on the average price of an airline ticket in the United States from 1975 until 1985, adjusted to eliminate the effect of inflation (the general increase in the prices of all goods over time). In 1978, the United States Airline Deregulation Act removed the price floor on airline fares, and it also allowed the airlines greater flexibility to offer new routes.

a. Looking at the data on airline ticket prices in the diagram, do you think the price floor that existed before 1978 was binding or non binding? That is, do you think it was set above or below the equilibrium price? Draw a supply and demand diagram, showing where the price floor that existed before 1978 was in relation to the equilibrium price.
b. Most economists agree that the average airline ticket price per mile traveled actually fell as a result of the Airline Deregulation Act. How might you reconcile that view with what you see in the diagram?

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Price of airline ticket (index: 1975 100) 160F 140 120 100 Year Source: U.S. Bureau of Labor Statistics.