?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Saint-Paul&rft.aufirst=Gilles&rft.volume=247&rft.date=2007&rft.atitle=On+Market+Forces+and+Human+Evolution&rft.title=Journal+of+Theoretical+Biology&rft.pages=397-412&rft.genre=article