?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Cremer&rft.aufirst=Helmuth&rft.date=1999&rft.atitle=Uncertainty%2C+Commitment+and+Optimal+Taxation&rft.title=Journal+of+Public+Economic+Theory&rft.genre=article