Karl Case, co-author with Shiller, of the Case-Shiller housing index, describes what the American dream of owning a house was always all about- having a safe long-term investment with the happiness gained from ownership of one's own home. It was never really meant to become a way to pay bills, and enjoy an artificially high standard of living based on artificially high speculative returns of 30% a year. Based on the authentic verson of this dream, it is still alive, says Case. Buying a house today costs less because of lower interest rates, the costs of a house are lower, and it provides a return in the form of rent that the owner doesn't have to pay for the home. Case has not factored in unemployment and job uncertainty, especially with the worsening economic outlook in 2011. This may still depress housing markets.