We exploit variation in gasoline and cigarettes taxes in adjacent political jurisdictions for northern Illinois and Indiana to examine consumers' trade-off between prices and travel. We develop a model that relates activity in the retail gasoline industry around the tax borders to consumer locations. Our results indicate that the willingness of a typical Chicagoland consumer to travel an additional mile to buy gasoline corresponds to about $0.065 to $0.084 per gallon. According to our estimates, the observed area of Chicago, the jurisdiction with the highest taxes, is missing approximately 40% of the capacity that would exist were taxes equalized.
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