1. Wharton Real Estate Center of the University of Pennsylvania, Philadelphia, PA 190104-6330, USA,
2. New York University School of Law, Center for Real Estate and Urban Policy, New York University, 40 Washington Square South, Room 411, New York, NY 10012-1099, USA,
3. Wharton Real Estate Department, University of Pennsylvania, Lauder-Fischer Hall, 256 South 37th Street, Philadelphia, PA 19104-6330, USA,