Concerns have been raised that payment cards used in contingent valuat
ion method studies may be subject to range and centering biases. This
paper develops a payment card using an exponential response scale. A t
est for biases is conducted with four versions of the payment card tha
t have greatly different ranges and center values. Range and centering
biases are not found except when the payment card truncates, or does
not present, the upper end of the Value distribution that respondents
may desire to select. (C) 1996 Academic Press, Inc.