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Tjalling Koopmans

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Date of Birth: 08/28/1910

Age: 74

Place of birth: Graveland

Citizenship: United States

Author Koopmans theorem

Tjalling Charles Koopmans was born August 28, 1910, in the village of Graveland (Graveland), 4 km to the north-west of Hilversum, Noord-Holland (Hilversum, North Holland). Get Koopmans education began at Utrecht University (Utrecht University), when he was seventeen. As the profile of discipline Tjalling chose mathematics. Three years later, in 1939, he switched to theoretical physics.

In 1933 Koopmans met with economist Jan Tinbergen (Jan Tinbergen), the future Nobel laureate. Thereafter Koopmans moved to Amsterdam (Amsterdam), to study mathematics under the guidance of Tinbergen. In addition to research in mathematical economics, Tjalling significantly expanded the area of ??their knowledge, intrigued econometrics and statistics. In 1936, he graduated from the University of Leiden (Leiden University) with a degree of Doctor of Philosophy. His thesis was called `Linear regression analysis of economic time ryadov` (` Linear regression analysis of economic time series`).

Koopmans moved to the United States in 1940. There he spent some time in government in Washington, DC (Washington DC), where he published works on transport economics to optimize routing decisions. Tjalling then moved to Chicago (Chicago), where he joined the research department of the Commission Cowles Research Economics, Department of direct relevance to the University of Chicago.

In 1946, Koopmans became a naturalized citizen of the United States. In 1948, he led the Cowles Commission. Growth hostile Cowles Commission minded opposition at the Department of Economics at the University of Chicago in the 1950s led Kumpansa to the fact that he began to persuade followers Cowles change their place of deployment. As a result, `semeystvo` Cowles moved to 1955 at Yale University, where the Commission was renamed the Cowles Foundation (Cowles Foundation). Koopmans continued to publish his work on the economics of optimal growth and activity analysis of production.

Early work on the theory Koopmans Hartree-Fock (Hartree-Fock) have a close relationship to the Koopmans theorem, which is very well known in quantum chemistry. Koopmans theorem is used to calculate the ionization potential of the atom or molecule within the molecular orbital method.

Tjalling, along with Leonid Kantorovich was awarded the Nobel Prize for his contribution in the area of ??distribution of resources, particularly in the theory of optimal use of resources in 1975. The work of Dutch-American economist, has made him a Nobel laureate, has focused on the analysis of production activities, the study of the interaction between cost and performance, as well as on the comparison of the economic efficiency and pricing.

The importance of research Koopmans, stemming from the distribution of the serial correlation coefficient estimates, the Hungarian-American mathematician John von Neumann (John von Neumann) was recognized. Subsequently Koopmans conclusions influenced the optimization of the test unit root Gar John (John D. Sargan) and Alok Bhargava (Alok Bhargava).

Tjalling Koopmans died February 26, 1985 th, in New Haven, Connecticut, United States (New Haven, Connecticut, USA).

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