Na 1940, Friedman nabatara ọnọdụ na Mahadum Wisconsin<unk>Madison, ma hapụrụ n'ihi esemokwu na ngalaba banyere United States itinye aka na Agha Ụwa nke Abụọ. Friedman kwenyere na United States kwesịrị ịbanye n'agha. Na 1943, Friedman sonyeere Ngalaba Nnyocha Agha na Mahadum Columbia (nke W. Allen Wallis na Harold Hotelling duziri), ebe ọ nọrọ oge fọdụrụ na Agha Ụwa nke Abụọ na-arụ ọrụ dị ka onye na-ahụ maka mgbakọ na mwepụ, na-elekwasị anya na nsogbu nke ngwá agha, usoro agha, na nnwale metallurgical. Na 1945, Friedman nyefere ego site na nnwere onwe ọkachamara (nke ya na Kuznets dere ma mezue n'oge 1940) na Columbia dị ka akwụkwọ doctoral ya. Mahadum ahụ nyere ya PhD na 1946. Friedman nọrọ afọ 1945<unk>1946 na-akụzi akwụkwọ na Mahadum Minnesota (ebe enyi ya bụ George Stigler na-arụ ọrụ).
Afọ 1945