RT Journal Article SR Electronic T1 Incentive Incompatibility and Starting-Point Bias in Iterative Valuation Questions: Comment JF Land Economics JO Land Econ FD University of Wisconsin Press SP 312 OP 315 DO 10.2307/3654745 VO 80 IS 2 A1 David Aadland A1 Arthur J. Caplan YR 2004 UL http://le.uwpress.org/content/80/2/312.abstract AB In a recent study, Whitehead (2002) proposes incentive-incompatibility and starting-point-bias tests for iterative willingness-to-pay questions. We show that if restrictions associated with the nature of starting-point bias are not imposed on the estimation, one obtains inconsistent estimates of the structural parameters and may draw inaccurate conclusions regarding the extent of incentive incompatibility and starting-point bias in contingent-valuation survey data. (JEL Q26, C35)