Instructor economics Yale, 1938-1941, assistant professor, 1941-1942, research associate, 1942-1949. On leave, 1942-1946, as senior business specialist OPA, 1942, principal economist War Shipping Administration, 1942-1944, assistant director div. ship requirements, 1944-1946, chief economics intelligence branch div. research for Europe, Department of State, 1946, assistant executive secretary President’s Committee on Foreign Aid, 1947, consultant House of Representatives Select Committee on Foreign Aid, 1947. Associate professor Massachusetts Institute Technology, 1949-1951, professor economics, 1952-1969, director Center International Studies.
1952-1969; on leave, 1951-1952, as assistant director Central Intelligence Agency, Washington. Member President’s Task Force Foreign Aid, 1961. President World Peace Foundation, 1956-1969.
Trustee Carnegie Endowment for International Peace, 1964-1969.