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In page Marshall Plan:

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Truman signed the Economic Cooperation Act into law on April 3, 1948; the Act established the Economic Cooperation Administration (ECA) to administer the program. ECA was headed by economic cooperation administrator Paul G. Hoffman. In the same year, the participating countries (Austria, Belgium, Denmark, France, West Germany, the United Kingdom, Greece, Iceland, Ireland, Italy, Luxembourg, the Netherlands, Norway, Sweden, Switzerland, Turkey, and the United States) signed an accord establishing a master financial-aid-coordinating agency, the Organisation for European Economic Co-operation (later called the Organisation for Economic Co-operation and Development or OECD), which was headed by Frenchman Robert Marjolin.[citation needed]