Is the U.S. losing a lot of jobs to offshore outsourcing? Jacob Funk Kirkegaard has looked at the available data, and suspects not: Offshoring, Outsourcing, and Production Relocation - Labor-Market Effects in the OECD Countries and Developing Asia (Peterson Institute working paper, April 2007).
The bottom line:
...Yet, with the broadest and most valid available empirical evidence largely free of seÂlection bias showing that just 1 in 25 US separations in mass layoffs can be attributed to either offshoring and offshore outsourcing, one cannot escape the conclusion that the heated public and political debate on the issue has been vastly overblown at least in the United States and that the direct employment effects are very limited. This is especially the case in the US economy as a whole, where very large numbers of jobs are constantly created and destroyed. The latest available data for 2005Q3show that more than 8 million jobs were created, while 7.4 million were lost.
Here are some more details: