A new white paper released by Freddie Mac details how communities can use mixed-income and social impact housing to stimulate economic growth and diversity while preserving affordable housing. The research examines properties in areas of concentrated poverty, which are areas designated by the Federal Housing Finance Agency that are characterized by disinvestment, persistently high poverty levels, low economic opportunity and high housing costs relative to income. These case studies reveal that federal and local investment is successfully preserving and improving affordable housing stock with financing models that can be replicated elsewhere.