@article{ref1,
title="Changes in Transportation Infrastructure and Commuting Patterns in U.S. Metropolitan Areas, 1960-2000",
journal="American economic review",
year="2010",
author="Baum-Snow, Nathaniel",
volume="100",
number="2",
pages="378-382",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-8282",
doi="10.1257/aer.100.2.378",
url="http://dx.doi.org/10.1257/aer.100.2.378"
}