Wassily Wassilyovich Leontief was a Russian-American economist renowned for his input–output theory of capital for which he received the Nobel Memorial Prize in Economic Sciences in the year 1973. His works in general and the input–output theory in particular were instrumental in understanding how the output of a particular sector influenced another sector of the economy. His studies transcended the bridge that economists tended to keep with raw empirical data during his time. He also put in efforts to make data available for further studies in future. Another facet of his studies was the use of computers at a time when most studies relied on theoretical suppositions. Apart from a meticulous researcher, he was also a great teacher, training four future Nobel Laureates during his years at Harvard. Towards the end of his career, he moved to the New York University, where he continued with his research work until the age of eighty-five, teaching there even after his retirement well into his nineties. He was widely recognized for his works as was evident by his memberships in many eminent societies and institutions. He was a thinker; but believed that theories were no good unless they were backed by facts.