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The Cost of Air Travel in the US Has Been Remarkably Stable for the Last Decade, and 17% Cheaper Than 20 Years Ago | American Enterprise Institute - AEI
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Scheduled passenger air transportation in the Producer Price Index: improvements and trends : Monthly Labor Review: U.S. Bureau of Labor Statistics
The Algorithm behind Plane Ticket Prices and How to Get the Best Deal – USC Viterbi School of Engineering
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