Tjalling Koopmans

Tjalling Charles Koopmans (August 28, 1910–February 26, 1985) was the joint winner, with Leonid Kantorovich, of the 1975 Bank of Sweden Prize in Economic Sciences in Memory of Alfred Nobel.

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Koopmans was born in 's-Graveland in the Netherlands. He began his university education at the University of Utrecht, aged 17, specialising in mathematics. 3 years later, in 1930, he switched to theoretical physics. In 1933, he met Jan Tinbergen, the 1969 Bank of Sweden prize winner, and moved to Amsterdam to study mathematical economics under him. In addition to mathematical economics, Koopmans extended his explorations to econometrics and statistics.

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Koopmans moved to the United States in 1940. There he worked for a while for a government body in Washington D.C., where he published on the economics of transportation focusing on optimal routing, then moved to Chicago where he joined a research body affiliated with the University of Chicago. In 1946, he became a naturalized citizen of the United States. In 1955, he moved to Yale University where he continued to publish, now on the economics of optimal growth and activity analysis. He died in 1985.

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It is striking that Koopmans's cousin Simon van der Meer won a Nobel Prize in Physics in 1984.

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August 28: August 28 is the 240th day of the year in the Gregorian Calendar (241st in leap years), with 125 days remaining....

1910: 1910 was a common year starting on Saturday (see link for calendar)....

February 26: February 26 is the 57th day of the year in the Gregorian Calendar. There are 308 days remaining, 309 in leap years....