Apart from that, Kuznets collaborated with a number of research organizations and government agencies. In 1931–1934, at Mitchell's behest, Kuznets took charge of the NBER's work on U.S. national income accounts, given the first official estimation of the US national income. In 1936, Kuznets took the lead in establishing the Conference on Research Income and Wealth, which brought together government officials and academic economists, engaged in the development of the U.S. national income and product accounts, and in 1947 helped to establish its international counterpart, the International Association for Research in Income and Wealth.