Yes, I have spent time on the Texas border, although I've not been to San Diego.

Have you lived and worked in Mexico City recently?

NoZe

Mexicans make up by far the largest group of undocumented migrants at 5.9 million or 57 percent of the total in the March 2004 estimates. This share has remained virtually unchanged for the past decade, even as the size of the undocumented population has grown very rapidly. In addition, another 2.5 million undocumented migrants or about 24 percent of the total are from other Latin American countries. About 9 percent are from Asia, 6 percent from Europe and Canada, and 4 percent from the rest of the world.

Given the few Mexican immigrants in the DC Metro area (as opposed to Salvadorians and other Central Americans), I'm guessing the pols & pundits are considering all Latin Americans to be Mexicans. Plus no other Latin American country compares in quantity of immigrants to Mexico. Reading the full article, I see it does look at the birthrates of other sources of illegals.

I get the impression from the exclamation marks that NoZe is being a bit sarcastic. Even if so, I think he is actually right in a lot of ways. I suspect that amongst educated persons in Mexico there is a larger prevalence of persons with knowledge (if not fluency) in English than with similar persons in the US who have a working knowledge of Spanish. For that matter, American restaurants and retail establishments are prominent in Mexico. The degree to which our music and tv shows penetrate their airwaves I can't say with any authority, but I know they are there. Certainly our movies, sports and fashions have influence.

There actually is a great deal of US influence over Mexican culture. I was struck when I was in Guadalajara some year ago that there were elements of the way business was done that reminded me far more of the US than it did of the way things were done in Bogota, Colombia (where I once lived for a year). Although certainly there were elements that were also quite Latin.

Of course, even in Colombia the influence of the US was quite clear--especially in terms of restaurants, products and retail business models.

And border towns are rarely the best judge for understanding a country as a whole.

(And yes, I have been to San Diego and elsewhere of relevance).

You ever spend any time along the Texas Border? Or, for that matter, in SanDiego?

So it's a matter of geography, not demographic birth rates?

As best as I can tell it's not “either-or”.

One of the reasons for the phenomenon (which I didn't find mentioned in Dr. Dunn's article) is that, when you send as many of your young people to another country to work, guess what? They have their babies there instead of at home. Go figure. That simultaneously pushes our per capita birthrate up and Mexico's down.

I don't think we should take too much solace in this. Mexico's going to need to import workers and that will cause social stress there (and, historically, they haven't been too good at handling stress). And businesses here which have based their strategies on an ever-increasing pool of low wage workers will either have a problem or they'll import workers from other countries who are even more difficult to assimilate into our population than the wave of Mexican immigrants of the last 20 years has been.