Document de travail On the Influence of Extreme Parties in Electoral Competition with Policy-Motivated Candidates Georges Casamatta et Philippe De Donder IDEI Working Paper n° 161, 2003 RéférenceGeorges Casamatta et Philippe De Donder, « On the Influence of Extreme Parties in Electoral Competition with Policy-Motivated Candidates », IDEI Working Paper, n° 161, 2003.