1. External Validity of Contingent Valuation: Comparing Hypothetical and Actual Payments. (9th October 2016) Authors: Ryan, Mandy; Mentzakis, Emmanouil; Jareinpituk, Suthi; Cairns, John Journal: Health economics Issue: Volume 26:Number 11(2017) Page Start: 1467 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗