The Illegal Immigration Slowdown

Tyler Cowen counters the conventional wisdom on various issues. Regarding illegal immigration from Mexico threatening the US:

The annual flow of about 500,000 illegal Mexican migrants has slowed to about 100,000 a year; that's a huge change. Mexico, meanwhile, is undergoing one of the most rapid demographic transitions in history as its fertility rate is just slightly over two per family, barely above America's. Thirty years from now, the United States may have to compete to lure Mexican immigrants across the border.