1. Very interesting Joe. Your efforts on this are impressive.
2. Don't re-create the WRDS 500. It's not that straight-forward. There are some data problems that I discovered as I went along and which made it a bigger headache than I'd imagined it would be. I'm more than happy to send you what I constructed. It needs to be updated. I only have up to 2007, and full year data should be available for at least 2008 and 2009, if not yet 2010.