Once, those foreign students stayed in the U.S. after graduation; now they depart. So we're training the competition.
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I think you're mistaken, at least what I see contradicts that. My neighborhood is in NW Nassau County on LI. Thirty minutes to mid-town, surrounded by world class medical complexes (North Shore, LI Jewish, St, Francis Heart) and the PS system is ranked number 4 in the country by USNews & World Report. In the past year six houses have sold within two blocks. Every buyer is Asian or Indian. Every buyer is a Medical or Technology professional. They could all have gone home and prospered but they all chose to stay here.