Economic policy of the Soviet Union (1921–28).
A temporary retreat from the failed War Communism policy of extreme centralization and doctrinaire socialism, the new measures included the return of most agriculture, retail trade, and light industry to private ownership (though the state retained control of heavy industry, banking, transport, and foreign trade) and the reintroduction of money into the economy. The policy allowed the economy to recover from years of war. In 1928 chronic grain shortages prompted Joseph Stalin to begin to eliminate private ownership of farmland and to collectivize agriculture under state control, effectively ending the NEP. By 1931 state control was reimposed over all industry and commerce.