The smart fraction among American ethnic groups: La Griffe du Lion has shown that per capita GDP is a function of the smart fraction: the percent of a population with a verbal IQ of 106 or higher. The vocabulary test of the General Social Survey can serve as a good measure of verbal IQ, and I'm interested in estimating the smart fraction of each ethnic group in the United States, especially those groups with currently high levels of immigration. Here is what I found (immigrants are excluded since they can't be expected to have the vocabularies that natives have):
The smart fraction
East Indian 49.9
All Native-born Americans 42.5
Puerto Rican 27.4
Once again, Mexican Americans fall to the bottom of the list. I'm surprised that Filipinos don't do better since their educational levels are quite good. If we want to become a wealthier society, and to the extent that immigrants match their native-born counterparts, we want to encourage the immigration of those who increase our smart fraction and discourage those who shrink it.
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