Chart of the Day: Which Cities Have the Least Affordable Housing?

San Francisco residents have the hardest time affording a two-bedroom apartment, followed by Washingtonians and New Yorkers. This according to a new report from the Urban Institute, which compared rental prices and average incomes in a handful of cities across the country. Here's a chart of the results:

Author Margery Turner suggests that the best urban areas (like Oklahoma City) managed to avoid the "excesses of the boom years" while maintaining a relatively robust economy. D.C., not so much. As Turner writes: