 A 2013 study in the "American Journal of Political Science" lends some support to the economic competition theory, as highly educated Americans who exhibit lower levels of xenophobia tend to support reductions in the number of highly skilled immigrants.A 2007 study in "International Organization" found that "people with higher levels of education and occupational skills are more likely to favor immigration regardless of the skill attributes of the immigrants in question.Across Europe, higher education and higher skills mean more support for all types of immigrants.