Geographic factors

If this is not an advert for not buying a house unless you plan to live there for the rest of your life, I don't know what is.

Ten percentage points separate the states with the highest and lowest unemployment rates. But the property crash is making it much harder for Americans to move to where the jobs are. A quarter of mortgage borrowers owe more than their houses are worth. Many people are stuck in places with poor employment prospects, unable to leave for cities where their skills may be in demand. Although the economy is starting to create new and often highly remunerative jobs, they are out of reach to those who cannot move.