I te tau 1940, i whakaaetia e Friedman he tūranga i te Whare Wānanga o Wisconsin<unk>Madison, engari i wehe atu nā te rerekētanga ki te kaiako e pā ana ki te whakauru o Amerika ki te Pakanga Tuarua o te Ao. I whakapono a Friedman me uru atu te United States ki te pakanga. I te 1943, i uru atu a Friedman ki te Tari Rangahau Pakanga i te Whare Wānanga o Columbia (i arahina e W. Allen Wallis me Harold Hotelling), i reira i noho ai ia i te toenga o te Pakanga Tuarua o te Ao hei kairangahau pāngarau, e arotahi ana ki nga raruraru o te hoahoa patu, nga tikanga hoia, me nga whakamatautau metallurgical. I te 1945, i tukuna e Friedman nga Moni mai i te Mahi Motuhake Motuhake Motuhake (i tuhia tahi me Kuznets me te whakaoti i te tau 1940) ki Columbia hei korero mo tana taatai. I whakawhiwhia e te whare wānanga ki a ia he PhD i te 1946. I noho a Friedman i te tau 1945<unk>1946 i te kura i te Whare Wānanga o Minnesota (i reira
Ko te 1945