Charles Frederick Roos (May 18, 1901 – January 6, 1958) was an American economist who made contributions to mathematical economics. He was one of the founders of the Econometric Society together with American economist Irving Fisher and Norwegian economist Ragnar Frisch in 1930. He served as Secretary-Treasurer during the first year of the Society and was elected as President in 1948. He was director of research of the Cowles Commission from September 1934 to January 1937.
Roos earned a PhD in mathematics from Rice University in 1926, under supervision of Griffith C. Evans. He was amongst the first, together with Evans and mathematician Frank P. Ramsey, to use the calculus of variations in mathematical economics. His direct involvement with two key institutions in economic history, both the Econometric Society and the Cowles Commission, place him in a pivotal position in the mathematization of economics in the first half of the 20th century. His own work, however, would not be so influential. Mathematical economics and econometrics eventually favored technical and epistemological approaches that were different from his own.
Biography
Charles Frederick Roos was born in New Orleans, Louisiana on 18 May 1901. He studied mathematics at the Rice Institute, receiving his Bachelor of Arts degree in 1921, his Master of Arts degree in 1924, and, being awarded his PhD in 1926. His main interests were in the calculus of variations, integral equations, and the applications of these to economic theory. His early research was deeply inspired by the work of his thesis advisor Griffith C. Evans who used these same mathematical tools to analyze business cycles, economic equilibrium, and economic competition. During the following years, from 1926 to 1928, Roos continued his academic studies as National Research Fellow at the University of Chicago and Princeton University.
At Princeton, Roos met the Norwegian economist Ragnar Frisch who was travelling there under a grant from the Rockefeller Foundation. They shared a common sentiment that economics should be brought closer to mathematics and to statistics (this would later become known as econometrics) and decided to request support from American economist Irving Fisher, at Yale University, to help organize an association to research such topics. Later that year, both Frisch and Roos met with Fisher to discuss the formation of what would become the Econometric Society. In 1930 the Econometric Society was founded; Frisch was elected to be its first president, and Roos its secretary-treasurer. During this period, Roos had also been serving as secretary for the American Association for the Advancement of Science (AAAS) where he oversaw Section K of economics, sociology and statistics. This position also allowed him to bring together subjects of his interest such as the applications of statistics to the social sciences, and also to invite fellow members of the Econometric Society to lecture and present research on such topics.
Following his National Research Fellowship Roos was hired as assistant professor of mathematics at Cornell University. He resigned this position in 1931 to assume a position as permanent secretary at the AAAS where he arranged programs in economics. In the wake of the Great Depression Roos organized a symposium on unemployment; the papers presented at this meeting were later published by the AAAS in a book entitled Stabilization of Employment. In 1933 Roos resigns from the AAAS to study mathematical economics in England under a Güggenheim fellowship. He quickly declines this fellowship, however, as he was called to be principal economist and director of research of the newly created National Recovery Administration (NRA). Roos' work during the short period he served as director of the NRA was later published by the Principia Press in 1937. Only a couple years later, in May 1935, the Supreme Court ruled that the NRA was unconstitutional and the organization was dissolved.