?url_ver=Z39.88-2004&rft_id=10.1111%2Fjoie.12331&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Decarolis&rft.aufirst=Francesco&rft.issue=n%C2%B0+2&rft.volume=vol.+71&rft.date=June+2023&rft.issn=0022-1821&rft.atitle=Bid+coordination+in+sponsored+search+auctions%3A+detection+methodology+and+empirical+analysis&rft.title=Journal+of+Industrial+Economics&rft.pages=570-592&rft.genre=article