Non-market valuation – methods and applications
Or how can you put a price on the environment?
Non-market valuation methods estimate the economic value of goods that have no price like the environment. DCEs are the most defensible of these methods. This article discusses the main non-market valuation methods, their theoretical foundations, and when to use a DCE instead of hedonic pricing, travel cost, or contingent valuation.
Knowledge Base -> Foundations -> Environment
Ben White, 07.07.2026
What is non-market valuation?
Economic cost-benefit analysis requires that all costs and benefits be expressed in monetary terms. For market goods this is straightforward. For environmental goods - clean air, biodiversity, heritage, landscape quality, ecosystem services - there is no market price to observe.
Non-market valuation methods estimate this missing price using either revealed preference data (what people actually do) or stated preference data (what people say they would do). The choice of method depends on the good being valued and the context of the policy question.
Comparing valuation methods
Revealed preference methods - hedonic pricing and travel cost - are grounded in observable behaviour, which gives them strong credibility. Their limitation is that they can only value goods that are related to market transactions: property prices, travel expenditure. Goods with no market proxy cannot be valued this way.
Stated preference methods - contingent valuation and DCEs - can value any environmental good but rely on hypothetical responses. DCEs produce more credible estimates than CVM because the trade-off structure reduces hypothetical bias and the decomposition into attributes is more useful for policy design.
When to use a DCE for environmental valuation
Step 1: Choose the method appropriate to the good. Use hedonic pricing for goods with a clear property price relationship. Use travel cost for recreational sites. Use DCEs for goods with multiple attributes or where the full economic value - including non-use value - must be estimated.
Step 2: Define the scope carefully. Scope sensitivity - WTP increasing with the scope of the environmental improvement - is a fundamental validity criterion. Design the study with scope tests built in.
Step 3: Select the payment vehicle. The mechanism through which respondents would pay for the good must be credible. Tax mechanisms work for public goods; private payment mechanisms work for goods with direct private benefits.
Step 4: Report benefit transfer limitations. Non-market valuation estimates are often transferred from study sites to policy sites. Document the assumptions required for valid transfer and the uncertainty around transferred estimates.
Worked example – ecosystem services valuation
The UK government's natural capital accounting programme requires monetary estimates for a range of ecosystem services - water purification, carbon sequestration, recreation, landscape character - to include in national accounts and investment appraisals.
A programme of DCE studies is commissioned covering freshwater quality, woodland recreation, upland landscape, and coastal habitats. Each study produces attribute-specific WTP estimates that feed into per-unit values used in the natural capital accounts. The values inform green infrastructure investment decisions across government.
References
Bateman, I.J. et al. (2002). Economic Valuation with Stated Preference Techniques. Edward Elgar.
Freeman, A.M., Herriges, J.A. and Kling, C.L. (2014). The Measurement of Environmental and Resource Values. RFF Press.
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