?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Le+Breton&rft.aufirst=Michel&rft.volume=67&rft.date=1999&rft.atitle=Separable+Preferences%2C+Decomposability+and+Strategyproofness&rft.title=Econometrica&rft.pages=605-628&rft.genre=article