Sven Ingvar Svennilson was a Swedish

Sweden

Sweden , officially the Kingdom of Sweden , is a Nordic country on the Scandinavian Peninsula in Northern Europe. Sweden borders with Norway and Finland and is connected to Denmark by a bridge-tunnel across the Öresund....

 economist

Economist

An economist is a professional in the social science discipline of economics. The individual may also study, develop, and apply theories and concepts from economics and write about economic policy...

 that became known for his theories in
planned economics. He was a member of the Stockholm school

Stockholm school (economics)

The Stockholm school, or Stockholmsskolan, is a school of economic thought whose antithesis is the gold standard centered Austrian School of Economics. It refers to a loosely organized group of Swedish economists that worked together, in Stockholm, Sweden primarily in the 1930s...

 of economic thought. From 1969–1971, he was a member of the committee that selects the laureates for the Sveriges Riksbank Prize in Economic Sciences, the Economics Prize Committee.

He was a member of the Royal Swedish Academy of Sciences

Royal Swedish Academy of Sciences

The Royal Swedish Academy of Sciences or Kungliga Vetenskapsakademien is one of the Royal Academies of Sweden. The Academy is an independent, non-governmental scientific organization which acts to promote the sciences, primarily the natural sciences and mathematics.The Academy was founded on 2...

 from 1960, and of the Royal Swedish Academy of Engineering Sciences

Royal Swedish Academy of Engineering Sciences

The Royal Swedish Academy of Engineering Sciences or Kungl. Ingenjörsvetenskapsakademien , founded in 1919 by King Gustaf V, is one of the Royal Academies in Sweden...

from 1961.