2.2.2. Non-market valuation methods and techniques
Based on the utilitarian conception of value underlying the foundations of CBA, the purpose of non-market valuation techniques is to estimate the value of ecosystem services by ascertaining individual preferences through the common, easily understood metric of money (Champ 2003, Freeman, 2003 and Dixon et al., 2013). The various techniques are generally split according to whether they are either revealed or stated preference methods.