Yes, the birthrate for Mexican-born women is significantly higher in the United States than it is in Mexico. I call this the cuckoo factor. The cuckoo bird lays its eggs in other birds’ nests and lets those other birds provide for its offspring.
“the cuckoo factor”
That’s a good analogy.
http://www.city-journal.org/html/eon2007-08-29sm.html
>>Both studies found that immigrants used government services at a greater rate than native-born residents did. The New Jersey study found, for instance, that the typical immigrant family received about $4,044 annually in government services, about 11 percent higher than the average native-born family. At the same time, immigrant households paid about 8 percent less in taxes. The net result was that the average native household generated an annual fiscal surplus of $232 to government, while the typical foreign household was a net burden of $1,484. The gap was even wider in California, where immigrant households produced a net deficit of $3,463 each, because so much of that states recent immigration had been in the form of low-wage, low-skill workers.
Though the study did not distinguish between legal and illegal immigrants, it did break down foreign-born households by the regions of the world from which they had come. In both states, the study found the steepest deficit in Latin American households, which in New Jersey consumed 26 percent more in government expenditures than the average native-born family, but paid 38 percent less in taxes. By contrast, immigrant households in New Jersey that hailed from Europe or Canada actually consumed, on average, less in government services than the typical native-born family, and paid nearly as much in taxes. <<