Modeled on America’s green card, the European Union’s “blue card” is a good start in attracting highly skilled migrants (“Letting Some of Them In,” October 4, 2008), but there are other American inventions of some vintage to copy in the global competition for talent. Take America’s student visas. Although most members of the Union are disadvantaged by language, as English is now the world’s lingua franca, the Union’s universities can easily switch to English in educational programs offered to the most talented migrants. Several countries in Northwestern Europe have started doing so long ago. The student visa offers a flexible filter for those worth keeping after graduation, and it also offers a straightforward acculturation tool. Several years pursuing a degree in any host country can do wonders in this regard. The best and the brightest among the migrants can then find a proper place within the Union with much greater ease. The Union’s university system is a crucial key to immigration that is yet to be properly employed.