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", followed in the same year by "Statics and dynamics in economic theory", which introduced dynamics in economic analysis. 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". He was a member of both the American Academy of Arts and Sciences and the American Philosophical Society. During the occupation of Norway by Nazi Germany Frisch 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. Family Frisch married Marie Smedal in 1920 and they had a daughter, Ragna (b. 1938). His granddaughter, Nadia Hasnaoui (Ragna's child), became a Norwegian television performer. After his first wife died in 1952, he remarried in 1953 with childhood friend Astrid Johannessen. who died in 1980. Work Frisch was one of the founders of economics as a modern science. He made a number of significant advances in the field of economics and coined a number of new words including econometrics and macroeconomics. His 1926 paper on consumer theory helped set up Neo-Walrasian research. He formalized production theory, especially in addressing nonallocable inputs leading to jointness, meaning less than full control, in production processes (see esp. Chapters 14 and 15). In econometrics he worked on time series (1927) and linear regression analysis (1934). With Frederick V. Waugh, he introduced the celebrated Frisch–Waugh theorem (Econometrica 1933) (sometimes referred to as the Frisch–Waugh–Lovell theorem). In oligopoly theory he developed the conjectural variation approach. Frisch also is credited with introducing the term "model" in its modern economic sense by Paul Samuelson, based on a 1930 Yale University lecture. His 1933 work on impulse-propagation business cycles became one of the principles of modern New Classical business cycle theory. He also helped introduce