Netherlands School of Economics, Rotterdam.
Professor, of Business Cycles and Economics, University of Rotterdam 1948-1963. Minister of Finance 1963-1965, 1967-1971, also First Deputy Prime Minister 1967-1971. Director Institute Monetary Fund 1973-1978.
Adviser to Board of Manager Director Amsterdam-Rotterdam Bank N.V. 1979-1990. Chair, Consultative Group on Institute Economical Monetary Affairs 1979-1985, Honorary Chairman since 1985.
First Chamber, States-General 1959-1963, 1971-1973, Second Chamber 1965-1967. Advisory Board Unilever N.V. 1972-1973, Robeco 1972-1973. Board Robeco since 1979, Royal Dutch Shell 1978-1989, Thyssen-Bomemisza 1978-1986, Nationale-Nederlanden since 1979. European Advisory Council General Motors 1979-1991, Institute Council Morgan Guaranty Trust Company 1978-1985.
Married Liesbeth De Vries Feyens in 1949.