In simple terms, Mexican families are smaller than they had once been. The pool of likely migrants is shrinking. Despite the dominance of the Roman Catholic Church in Mexico, birth control efforts have pushed down the fertility rate to about 2 children per woman from 6.8 in 1970, according to government figures. So while Mexico added about one million new potential job seekers annually in the 1990s, since 2007 that figure has fallen to an average of 800,000, according to government birth records. By 2030, it is expected to drop to 300,000.

Even in larger families like the Orozcos’ — Angel is the 9th of 10 children — the migration calculation has changed. Crossing “mojado,” wet or illegally, has become more expensive and more dangerous, particularly with drug cartels dominating the border. At the same time, educational and employment opportunities have greatly expanded in Mexico. Per capita gross domestic product and family income have each jumped more than 45 percent since 2000, according to one prominent economist, Roberto Newell. Despite all the depictions of Mexico as “nearly a failed state,” he argued, “the conventional wisdom is wrong.”

[D'oh!]