Tjalling C. Koopmans

He was a Dutch citizen by birth and became a naturalized citizen of the United States in 1946, six years after shifting to USA.

He married economist, Truus Wanningen, in 1936. The couple had three children, a son named Henry W. Koopmans and daughters, Anne Koopmans Frankel and Helen Koopmans Weinert. All his children chose careers related to life sciences.

He suffered a stroke and died on 26 February 1985 at New Haven, Connecticut. He was 74 years at the time of his death.

Tjalling C. Koopmans was born on 28 August 1910 at ’s-Graveland in Netherlands. His parents, Sjoerd Koopmans and Wijtske van der Zee, were trained school teachers and his father was the headmaster of the (Protestant) ‘School with the Bible’.

He had two older brothers: Jan Koopmans, who grew up to become minister of the Dutch Reformed Church, and Hendrik Koopmans, who became a qualified chemical engineer.

At the age of 14, Tjalling Koopmans was awarded a stipend by the St. Geertruidsleen of Wijmbritseradeel in the Dutch province of Friesland. The stipend helped him to a great extent in pursuing higher studies.

In 1927, he enrolled into the Utrecht University to pursue studies in mathematics. However, after completing three years he shifted to theoretical physics.

In 1933, Tjalling got the opportunity to meet Dutch economist, Jan Tinbergen, and Tjalling shifted to Amsterdam to study mathematical economics under Tinbergen’s guidance. He was also interested in statistics and econometrics. He completed his PhD in Economics from University of Leiden in 1936.

Between 1936 and 1938, he worked at the School of Economics at Rotterdam as a substitute lecturer in place of Jan Tinbergen who was appointed to the Financial Section of the League of Nations to work on model of business cycles in the United States.

In 1938, Tjalling Koopmans was asked to work in Geneva and prepare a similar business cycle model for the United Kingdom. However, with the outbreak of World War II, the project was terminated. During his time in Geneva, he understood the concept regarding economics of welfare and the issues associated with optimum population, from economist James Meade

In 1940, he moved to United States along with his family. He was first employed with British Merchant Shipping Mission at Washington D.C where he published information on the economics of transportation with attention to reorganizing shipping to reduce transportation costs.

He achieved satisfactory results by solving a few equations that included the price of materials at the point of origin and the cost towards transporting the goods using different routes. He formulated a mathematical representation of the issue that connected to the required equations.

In 1944, he was invited to join the Cowles Commission for Research in Economics, affiliated with the University of Chicago. There was immense scope for research with focus on creating econometric models by combining knowledge of mathematical modeling, economic theory and statistics.

Tjalling Koopmans was an economist whose works focused on the optimal allocation of resources in order to successfully attain results at an affordable cost. He is regarded the pioneer of this model called ‘Activity Analysis‘. He is also known as one of the inventors of linear programming.