http://www.tnr.com/blog/the-avenue/high-speed-rail-getting-the-assumptions-right

With a just-released Brookings report suggesting that high speed rail (HSR) could mitigate excessive congestion at airports, it would be nice to know if and where rail is a viable investment. The Harvard economist Ed Glaeser sparked a useful debate on the merits of high speed rail with a few recent posts at Economix over at The New York Times.