In the former case, the inflation was due to sketchy MBS's. In the latter case, price inflation in major city center's suburbs are causing the cost of building

In the former case, the inflation was due to sketchy MBS's. In the latter case, price inflation in major city center's suburbs are causing the cost of building materials to go sky (lumber I believe is up 16% in the past 6 months), thus making a house that was once 100$ a square foot to build now 135$ a square foot.