Exposure to Western Ideas and Business Practices. Eastern nations, specifically China, often send students to learn of ideas and business practices that are different than the norms of their home countries.
Top Academic Institutions. The U.S. offers academically challenging universities that out perform universities in some of the nations that send scholars to America. Ivy League institutions are particularly popular for these scholars.
Marketing and Recruitment. U.S. universities and private organizations partner with compulsory schools abroad to attract scholars during their undergraduate or graduate studies.
Check out this link from the Economist to learn more about reasons for the trend in students studying in the U.S.
A yearning for American higher education has driven a surge in overseas study