The U.S. house price boom has been linked to an unsustainable easing of mortgage credit standards. However, standard time series models of US house prices omit credit constraints and perform poorly in the 2000?s. We incorporate data on credit constraints for first time buyers into a model of US house prices based on the (inverted) demand for housing services. The model yields not only a stable long-run cointegrating relationship, a reasonable speed of adjustment, plausible income and price elasticities and an improved fit, but also sensible estimates of tax credit effects and the possible bottom in real house prices.

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March 2011     Paper Number SERCDP0076

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