Russia's gross domestic product rose 7.7 percent in the first quarter of 2007, Russian Prime Minister Mikhail Fradkov announced Thursday. Fradkov said people's real income increased 13 percent with investment in fixed capital going up by more than 20 percent in the first quarter, UPI quoted RIA Novosti as reporting. The Russian GDP rose 5 percent during the first quarter last year. The Russian economics ministry said the 2006 growth was due largely to heavier investment in the domestic economy, notably in the construction sector, and in retail trade and processing industries.