Why Skilled Immigrants Are Leaving the U.S. (Business Week, Yahoo! News)

http://www.businessweek.com/technology/content/feb2009/tc20090228_990934.htm

March 3, 2009
By Vivek Wadhwa

The recent study Wadhwa refers to, lead by Wadhwa himself and put out by the Kauffman Foundation, can be found in pdf format here. Wadhwa writes:

We find that, though restrictive immigration policies caused some returnees to depart the United States, the most significant factors in the decision to return home were career opportunities, family ties, and quality of life.

This is in line with similar studies I have read; however, this study is by far the most comprehensive - and possibly the most explicitly biased, as it's put out by the Kauffman Foundation which mainly aims to "advance entrepreneurship" (i.e. view migrants as labor) but more soon after I read the entire study.