After a cursory search, I found these from Indiana University:
http://www.indiana.edu/~homeeduc/format_dissertations.html
http://www.indiana.edu/~homeeduc/topic_socialization.html
There are hundreds of homeschool related research papers mentioned here spanning many years. If this is not to your satisfaction, perhaps a more diligent search on your part will provide you with the precise dozens of studies you require.
Alvord, Scott T. "Comparison of Perceived Social Self-Efficacy and Self-Esteem between Home and Traditionally Educated College Students." Psy.D., George Fox University, 2003.
Sadly None of them address the issue(s) I raised, End results, performance as an adult.
I’m sure your links will not be good enough either, for some arbitrary reason or another.