The Transportation Services Index (TSI) is a measure of the month-to-month changes in the output of services provided by the for-hire transportation industry. The index can be examined together with other economic indicators to produce a better understanding of the current and future course of the economy. The U.S.-Origin Air Travel Price Index (ATPI) measures change in the cost of itineraries originating in the United States, whether the destinations are domestic or international. The Foreign-Origin ATPI measures change in the cost of itineraries with a foreign origin and a U.S. destination. The Full-Scope ATPI combines the domestic and foreign-origin itineraries.


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