Tjalling Koopmans

Tjalling C. Koopmans
Koopmans in 1967
Born	(1910-08-28)August 28, 1910 's-Graveland, Netherlands
Died	February 26, 1985(1985-02-26) (aged 74) New Haven, Connecticut, US
Nationality	Dutch, American
Alma mater	University of Utrecht University of Leiden
Known for	Transport economics Hitchcock–Koopmans transportation problem Ramsey–Cass–Koopmans model Koopmans' theorem
Awards	Nobel Memorial Prize in Economic Sciences (1975)
Scientific career
Fields	Economics, Physics
Institutions	University of Chicago
Doctoral advisor	Hans Kramers Jan Tinbergen
Doctoral students	Carl Christ Stanley Reiter Rolf Mantel [es] Guillermo Calvo

Tjalling Charles Koopmans (August 28, 1910 – February 26, 1985) was a Dutch-American mathematician and economist. He was the joint winner with Leonid Kantorovich of the 1975 Nobel Memorial Prize in Economic Sciences for his work on the theory of the optimum allocation of resources. Koopmans showed that on the basis of certain efficiency criteria, it is possible to make important deductions concerning optimum price systems.