Working Paper University of Rennes 1 University of Caen Using Respondents’ Uncertainty Scores to Mitgate Hypothetcal Bias in Community-Based Health Insurance Studies Hermann Pythagore Pierre Donfouet CREM UMR CNRS 6211, University of Rennes 1, France Pierre-Alexandre Mahieu LEMNA, University of Nantes, France Eric Malin CREM UMR CNRS 6211, University of Rennes 1, France October 2011 - WP 2011-29 Centre de Recherche en Économie et Management Center for Research in Economics and Management