I love reading Paul Krugman's The New York Times blog . His attempts to make sense of the world using hard economic data appeals to the "numbers guy" and "amateur economist" in me. While almost everything Prof. Krugman posts is noteworthy, I will share his comments on public transportation today. Paul Krugman: A tale of three cities By Paul Krugman Published: May 11, 2008 In case you’re wondering, I didn’t write about public transit for tomorrow. But I did some homework on the thought that I might, and might as well put it here. So here’s Exhibit A for the proposition that even in a nation with low overall population density, where the antelope roam and the skies are not [...] It is amazing how little most US cities have done to make public transportation a more feasible option. I think one of the major ways the US can minimize its dependence on oil is to invest more in urban public transportation infrastructure. The 2000 US Census shows that 58% of the...