Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
Criticism of contingent valuation (CV) stresses warm glow and free‐riding as possible causes for biased willingness to pay figures. We present an empirical framework to study the existence of warm glow and free‐riding in hypothetical WTP answers based on a CV survey for the measurement of health‐related Red Cross services. Both in conventional double‐bounded and spike models we do not find indication of warm glow phenomena and free‐riding behaviour. The results are very robust and insensitive to the applied payment vehicles. Theoretical objections against CV do not find sufficient empirical support. Copyright © 2004 John Wiley & Sons, Ltd.