Editing Ragnar Frisch (section)

===Later career===
Although his fellowship was extended to travel to [[Italy]] and France, the next year Frisch had to return to Norway because of his father's death. He spent one year to modernize and recapitalize his family's workshop by selling family assets and to find a jeweller to manage the business for him. Then he resumed academic work, in 1928 being appointed Associate Professor of statistics and economics at the Oslo University. During 1927 and 1928 Frisch published a series of articles on the statistics of time series. In 1929 he published his first important essay on econometric methodology, "Correlation and scatter in statistical variables",<ref>{{cite journal | author = J. W. | year = 1931 | title = Frisch (Ragnar): Correlation and Scatter in Statistical Variables. | journal = Journal of the Royal Statistical Society | volume = 94 | issue = 1 | pages = 95–98 | doi = 10.2307/2341822 | jstor = 2341822 }}</ref> followed in the same year by "Statics and dynamics in economic theory", which introduced dynamics in economic analysis.<ref name=SP>See Selected Publications</ref>

Frisch became a full Professor at the university in 1931. He also founded at the university the Rockefeller-funded Institute of Economics in 1932 and became its Director of Research.

Ragnar Frisch received the Antonio Feltrinelli prize from the [[Accademia Nazionale dei Lincei]] in 1961 and the [[Nobel Memorial Prize in Economic Sciences]] in 1969 (awarded jointly with [[Jan Tinbergen]]) for "having developed and applied dynamic models for the analysis of economic processes".<ref>{{cite web| url = http://nobelprize.org/nobel_prizes/economics/laureates/1969/index.html| title = The Sveriges Riksbank Prize in Economic Sciences in Memory of Alfred Nobel 1969}}</ref> He was a member of both the [[American Academy of Arts and Sciences]] and the [[American Philosophical Society]].<ref>{{Cite web |title=Ragnar Anton Kittil Frisch |url=https://www.amacad.org/person/ragnar-anton-kittil-frisch |access-date=2022-08-31 |website=American Academy of Arts & Sciences |language=en}}</ref><ref>{{Cite web |title=APS Member History |url=https://search.amphilsoc.org/memhist/search?creator=Ragnar+Frisch&title=&subject=&subdiv=&mem=&year=&year-max=&dead=&keyword=&smode=advanced |access-date=2022-08-31 |website=search.amphilsoc.org}}</ref>

During the [[occupation of Norway by Nazi Germany]], Frisch was arrested, along with 13 other University of Oslo faculty members and more than 100 students, in October 1943.<ref>{{Cite journal |date=1944 |title=Arrest of Professor Frisch |url=https://www.jstor.org/stable/1905570 |journal=Econometrica |volume=12 |issue=1 |pages=93–93 |issn=0012-9682}}</ref> He was imprisoned in [[Bredtveit concentration camp]] from 17 October 1943, then in [[Berg concentration camp]] from 22 November 1943, then in [[Grini detention camp]] from 9 December 1943 to 8 October 1944.<ref>{{cite book|editor=Ottosen, Kristian|editor-link=Kristian Ottosen|title=Nordmenn i fangenskap 1940–1945|edition=2nd|year=2004|publisher=Universitetsforlaget|location=Oslo|language=no|isbn=978-82-15-00288-0|page=226}}</ref>