Final answer:
Both Lenin's NEP and Stalin's Five-Year Plans aimed at the rapid industrialization of the Soviet economy, although through different approaches.
Step-by-step explanation:
The economic goal shared between Lenin's New Economic Plan (NEP) and Stalin's Five-Year Plan was the rapid industrialization of the Soviet Union. Lenin's NEP introduced some market-oriented reforms to revitalize the economy after the massive dislocations caused by World War I and the civil war, whereas Stalin's Five-Year Plans aimed at expanding Soviet industrial capacity and output through radical state-controlled measures. Both plans sought to modernize the Soviet Union's economy, but the NEP was more of a temporary measure, while the Five-Year Plans were ambitious, ongoing efforts to achieve economic self-reliance and to elevate the USSR to parity with Western industrial powers.