The blog article with a link to chapter one of the study can be found here: http://blogs.ft.com/crookblog/2008/03/the-dumbing-of-america...

Seems to be a position paper used to support higher H1B limits. But I found the bit about "immigrant entrepreneurs" to be interesting. Quote:

"The survey found a substantial rise in the share of immigrant- founded venture capital–backed companies in America. The share rose from just 7 percent in 1970–80 to 20 percent in 1980–89"