The Eberstadt papers primarily document his extensive career in public service to the United States related to defense and the economy, as well as his career as an investment banker and his personal life, and include correspondence, reports, his writings, and his personal papers. The papers especially document his work during World War II with the production and distribution of supplies to the military, and his subsequent work on the reorganization of the military. The papers include files concerned with his work with the Reparations Conference in Paris, the Army-Navy Munitions Board, the War Production Board, the United Nations Atomic Energy Commission, the National Security Resources Board, and the Hoover Commission on Government Reorganization.