Haavelmo, Trygve

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Trygve Haavelmo (trüg´və hävelmō), 1911–99, Norwegian economist. In the 1940s, he was a pioneer in the field of econometrics, using mathematics and statistics in the formation of economic theories. In 1989, Haavelmo won the Nobel Memorial Prize in Economic Sciences. He wrote A Study in the Theory of Investment (1960).