A significantly higher proportion of immigrants to the United States have been much less skilled so these newcomers have depressed the earnings of low-paid Americans and increased the gap relative to the highest paid.
http://cnews.canoe.ca/CNEWS/Canada/2007/05/25/pf-4207871.html
Note: http://cnews.canoe.ca/C...

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Dave Ruston
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"When you change the way you look at things, the things you look at change."
-Max Planck