Yale Economist Robert Shiller says the long decline in housing prices may not be over yet. “Home prices show a lot of momentum; they’re not like the stock market. The real question is do we still have downward momentum?” Shiller tells FOX Business Network. “There are a lot of positive signs but a skeptic who believes in momentum and says it’s been going on now for six years, and I am a little bit of that skeptic, might well say it’s going to keep going down. After the seasonal blip is over, it may not be over.” Shiller also talks about regions where the housing market is most impressive.