March 31, 2008. Dr. Martin Luther King, Jr. was assassinated forty years ago while in Memphis supporting the unionization of African American sanitation workers. To commemorate Dr. King’s commitment to unionization, FPI and the Center for Economic Policy Research (CEPR) are releasing new data about unionization among blacks in the nation and in New York State. Press release and data tables (unionization rates and union membership by race, 50 states). Also see CEPR’s Unions and Upward Mobility for African-American Workers.