So we should just open up our borders to the third world and destroy our economy?
In 2002, the net loss to U.S. natives from immigration was $68 billion.
This $68 billion annual loss represents a $14 billion increase just since 1998. As the size of the immigrant population has continued to increase, so has the loss.
The decline in wages is relative to the price of goods and services, so the study takes into account any change in consumer prices brought about by immigration.
The negative effect comes from increases in the supply of labor and not the legal status of immigrants.
While natives lose from immigration, the findings show that immigrants themselves benefit substantially by coming to America.
Those who remain behind in their home countries also benefit from the migration of their countrymen.
http://www.cis.org/articles/2005/back205.html