Please click on the link below, you will understand what is the Super Cities in the USA that are developing? In my opinion, the next trillion dollar real estate development will all concentrated in these super cities. It’s best to not deviate from this geography when you need to make a location decision. You can get more research information from Brookings Institute and other research institutions. According to their projections, next 30 years’ population increase will accelerate in these Super Cities, however, as evidenced by current situation, for example, Northeast corridor super city, the developable area is approaching near total build-out, meaning, the future pressure for higher property/land price will even be higher than the past 30 years. You can probably can forget about Prof Shiller’s statistical gloom and doom talk about real estate, the fact is, as long as you are in one of these land-scarce super cities, you will expect that your property value to follow the same pattern it has taken for the past 50 years, doubling every 10 years.

http://www.usatoday.com/news/nation/2005-07-10-megacities_x.htm