When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
By Susan M. Wachter, Joseph Tracy. Susan M. Wachter is the Albert Sussman Professor of Real Estate and Professor of Finance, The Wharton School; Professor of City and Regional Planning, School of Design; and Co-Director, Penn Institute for Urban Research, at the University of Pennsylvania.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.