Wassily Wassilyevich Leontief was a Russian-American economist known for his research on input–output analysis and how changes in one economic sector may affect other sectors. The Sveriges Riksbank Prize in Economic Sciences in Memory of Alfred Nobel 1973, announced October 18, 1973. Wassily Leontief, “for the development of the input-output method and for its application to important economic problems”. Wassily Leontief: born 1906, St. Petersburg, Russia. Wiki link Data: the Nobel Foundation (CC0).