Ryan, MandyMentzakis, EmmanouilJareinpituk, SuthiCairns, John2017-10-092017-10-092017-11Ryan, M, Mentzakis, E, Jareinpituk, S & Cairns, J 2017, 'External Validity of Contingent Valuation : Comparing Hypothetical and Actual Payments', Health Economics, vol. 26, no. 11, pp. 1467-1473. https://doi.org/10.1002/hec.34361057-9230http://hdl.handle.net/2164/9418We thank respondents for taking part in the study and 2 anonymous reviewers for their helpful comments. Financial support from the University of Aberdeen and the Scottish Government Health and Social Care Directorates is acknowledged.764738engcontingent valuationexternal validitycertaintyR MedicineRJournal article10.1002/hec.34362611