Are you joking???
There are lots of bald mexicans.
But I think it again, and the fact is there are less mexicans that go bald when they are young. I´m based in my own observations. They tend to go horribly bald when they become 40, but not younger.
It is curious, since most caucasian and nordic types seem to start thinning earlier, we tend to hold certain level of norwoodness (3,4) to an old age, mexicans seem to go NW1->NW7 overnight. No middle point for them.
If I have to say a race that is privileged in the hair thing, I´ll say american native indians, hey mate, doctors should check their DNA or their follicles or somethig, becouse I´ve never seen any Big Bald Bull or Great Horseshoe Eagle. They all, even ancient ones, keep a superior thick hair.