Housing costs keep rising across the United States, and policymakers are scrambling for solutions. In Congress, policymakers from across the aisle are advancing legislation aimed at encouraging more housing construction, based on the idea that increasing supply will help bring prices down. But what actually makes housing "affordable" and who benefits from the policies meant to fix the problem? Drawing on decades of research and experience working on housing issues in New York City, Professor Hilary Botein explains how politics and local housing markets affect who has access and why simply building more housing may not help people with the lowest incomes.