I came across this post via Mark Thoma's blog. Pretty relevant stuff these days:
Waves of new immigrants often spark economic anxiety and cultural discomfort, as well as occasional violence and wide-net crackdowns, on the Arizona model. Even here, a nation comprised almost entirely of immigrants and their descendents, we’ve seen these reactions not only in recent times but also a century ago, when waves of poor immigrants from Europe arrived here. With a hundred years’ distance, however, we can now see that those early waves of immigration were generally associated not with economic dislocation and national decline, but with extraordinary economic boom times and America’s emergence as the world’s leading economy. And for much the same reasons as a century ago, recent evidence indicates that the economic effects of the current waves of immigration are also largely positive.Read the rest here.