Here is a really interesting 2002 interview with Glenn Loury about race, identity, and economics. One excerpt from the NY Times Magazine profile:
[Professor Glenn] Loury argues that blacks are no longer held back by ''discrimination in contract'' -- discrimination in the job market -- but rather by ''discrimination in contact,'' informal and entirely legal patterns of socializing and networking that tend to exclude blacks and thereby perpetuate racial inequality.
Fascinating stuff. If the link doesn't work, try Professor Loury's homepage.