Supplementary materials: The Primary studies used in the meta-analysis

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Birol E, Karousakis K, Koundouri P (2006) Using a choice experiment to account for preference heterogeneity in wetland attributes: The case of Cheimaditida wetland in Greece.Ecological Economics 60(1): 145–156.

Birol E, Koundouri P, Kountouris Y (2008) Integrating wetland management into sustainable water resources allocation: The case of akrotiri wetland in Cyprus. Journal of Environmental Planning and Management 51(1): 37–53.

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Judez L (1998) Evaluation contingente de l'usage recreatif d'une reserve naturelle humide. Cahiers d'EconomieetSociologieRurales 48: 37–60.

Kaffashi S, Shamsudin MN, Radam A, Rahim KA, Yacob MR, Muda A, Yazid M (2011) Economic valuation of Shadegan International Wetland, Iran: Notes for conservation. Regional Environmental Change 11(4): 925–934.

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Ko J, Day JW, Lane RR, Day JN (2004) A comparative evaluation of money-based and energy-based cost-benefit analyses of tertiary municipal wastewater treatment using forested wetlands vs. sand filtration in Louisiana. Ecological Economics 49(3): 331–347.

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Mmopelwa G, Blignaut JN, Hassan R (2009) Direct use values of selected vegetation resources in the Okavango Delta Wetland. South African Journal of Economic and Management Sciences 12(2): 242–255.

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Oglethorpe DR, Miliadou D (2000) Economic valuation of the non-use attributes of a wetland: A case-study for Lake Kerkini. Journal of Environmental Planning and Management 43(6): 755–767.

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Whitten SM, Bennett JW (2002) A travel cost study of duck hunting in the Upper South East of South Australia. AustralianGeographer 33(2): 207–221.

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