America's 21st-Century Business Model

New Geography reports:

In 2005 the U.S. swore in more new citizens than the next nine countries put together. The national immigration debate may focus largely on low-skilled newcomers, but more than half of all skilled immigrants in the world also come to the U.S. Even with the continent's slow-growing population, Europe continues to be a major source of American immigrants, particularly skilled workers, with some 400,000 E.U. science and technology graduates residing in the U.S.

These newcomers are a prime source of entrepreneurial vitality. In the 21st century Asians, like the Jews and Italians before them, have concentrated in specific niches and expanded outside the boundaries of historic ghettos.

Another Joel Kotkin article well worth your time.