With just one month to go before the end of the first-time home buyers' tax credit, house hunters are trying to wrap up purchases in time to get up to $8,000 back from the federal government. It's unclear whether the tax credit has improved the economy, as it was intended to do. But Fox School of Business Finance Professor Bruce Rader says it's had an effect on the housing market. "Whenever you stop one of these kinds of programs," Rader said, "what happens is that you're basically pre-loading demand. And so I think you'll see a little bit of a slowdown, maybe prices go down a little, but I think you've taken a lot of supply off the market, so I think that's a good thing."