try papers.ssrn.com
The big question, alluded to above, is is this a waste of time? My guess is no but its also clear that none of these academics are making alot of money by investing in stocks. That said, I think if you combine the results in some of these papers with whatever trading system you have it could be interesting. For instance, I like to play mean reversion systems and I've recently been filtering based on P/R&D based on some results I've seen.