Regional Plan Association published a report by Cristobal Young on millionaire density in high tax states and tax-driven flight.

Regional Plan Association is an independent, non-profit civic organization that develops and promotes ideas to improve the economic health, environmental resiliency, and quality of life of the New York metropolitan area. We conduct research on transportation, land use, housing, good governance, and the environment, and advise cities, communities, and public agencies. Some of the region’s most significant public works, economic development and open space projects have their roots in RPA ideas and initiatives, from the location of the George Washington Bridge to the revitalization of downtown Brooklyn, Stamford, and Newark to the preservation of open space and development of parks in the Palisades, Governors Island and Gateway National Recreation Area. RPA has pursued these goals by conducting independent research, planning, advocacy and vigorous public-engagement efforts. Every year, leaders and professionals from government, business, and civic groups debate the region’s most pressing challenges at RPA’s spring conference, the Assembly. A cornerstone of our work is the development of long-range plans and policies to guide the region’s growth. Since the 1920s, RPA has produced four landmark plans for the region. The most recent was released in November 2017.