Valuing beach cast utilization and addressing preference uncertainty
(English)Manuscript (preprint) (Other academic)
Eutrophication and global warming have created major problems with decaying macroalgae on Baltic Sea beaches. A considerable amount of this biomass is retrieved, only to be returned to the sea when the tourist season ends. It is therefore essential to implement systems whereby the retrieved biomass is utilised. One potential system is anaerobic digestion for biogas and biofertiliser recovery, but knowledge about non-market benefits is lacking. This study estimated the willingness-to-pay (WTP) for algae retrieval and utilisation in a case study area and examined methods for incorporating preference uncertainty information into WTP estimates. This was done by gathering data using two different methods and comparing the results. In addition, results obtained from an open-ended interval (OEI) format were compared with those from a payment card. A substantial mean WTP was found. The two elicitation formats produced similar mean WTP estimates. However, the OEI format produced weaker results, with a significantly higher level of stated preference uncertainty and an elevated zero response rate. Comparisons of preference uncertainty information gathered with two different methods yielded unexpected results and to some extent contradicted findings on interval size in the OEI format as a good measure of preference uncertainty.
willingness-to-pay, biogas, Baltic Sea, macroalgae, preference uncertainty, contingent valuation
IdentifiersURN: urn:nbn:se:kth:diva-156385OAI: oai:DiVA.org:kth-156385DiVA: diva2:766248
QC 201411262014-11-262014-11-262014-11-26Bibliographically approved