Here's Cave:
The extraordinary Mexican migration that delivered millions of illegal immigrants to the United States over the past 30 years has sputtered to a trickle, and research points to a surprising cause: unheralded changes in Mexico that have made staying home more attractive.This could all change very quickly, of course, if conditions both there and here were reversed. Cave calls one hundred thousand illegals a year "a trickle" but it's still a substantial figure.
A growing body of evidence suggests that a mix of developments — expanding economic and educational opportunities, rising border crime and shrinking families — are suppressing illegal traffic as much as economic slowdowns or immigrant crackdowns in the United States.
American census figures analyzed by the nonpartisan Pew Hispanic Center also show that the illegal Mexican population in the United States has shrunk and that fewer than 100,000 illegal border-crossers and visa-violators from Mexico settled in the United States in 2010, down from about 525,000 annually from 2000 to 2004. Although some advocates for more limited immigration argue that the Pew studies offer estimates that do not include short-term migrants, most experts agree that far fewer illegal immigrants have been arriving in recent years.
The question is why. Experts and American politicians from both parties have generally looked inward, arguing about the success or failure of the buildup of border enforcement and tougher laws limiting illegal immigrants’ rights — like those recently passed in Alabama and Arizona. Deportations have reached record highs as total border apprehensions and apprehensions of Mexicans have fallen by more than 70 percent since 2000.
But Mexican immigration has always been defined by both the push (from Mexico) and the pull (of the United States). The decision to leave home involves a comparison, a wrenching cost-benefit analysis, and just as a Mexican baby boom and economic crises kicked off the emigration waves in the 1980s and ’90s, research now shows that the easing of demographic and economic pressures is helping keep departures in check.
That's why the need to secure the border and to address the problem of what to do with illegal immigrants who are already here remains pressing.