Into the United States that is:
Overall, the relationship is strong and positive (r = .56, p < 0.001): immigrant groups that are more skill-selected tend to have higher average incomes. The five most skill-selected groups are: Taiwanese, Nigerians, Swedes, Indians and Swiss. The five least skill-selected groups are: Mexicans, Salvadorans, Hondurans, Portuguese and Cape Verdeans. For example, 82% of Nigerians are high-skilled, while only 4% are low-skilled. By contrast, only 14% of Mexicans are high-skilled, while 57% are low-skilled.
Methodological caveats: I was unable to match a number of the ancestry groups (e.g., ‘Hmong’, ‘Jewish’, ‘Cajun’); the income data are not adjusted for household size or reporting bias.