The US will yield to China in the economic leadership in 2017.

Maria Frolova : journalist
"They also say that this will not be the final step in the re-arrangement of forces in the world economy and that less than in 40 years Russia will play one of main roles while Europe’s largest economies will be lagging behind."

Maria Frolova, " China to become world's biggest economy" The Voice of Russia. 18 Jan 2013.