"Tight visa restrictions and complicated paperwork can make hiring overseas candidates a hassle, and with local talent abundant for many positions these days, some companies don't see much reason to try hiring anyone else. The potential for cultural misunderstandings and additional training costs are just too high. That has left many overseas students with job-offer rates well below their domestic-born peers at many institutions."

http://online.wsj.com/article/SB1000..._CJEducation_5