examples of rp techniques are the hedonic regression technique and the travel cost method the former can be used to estimate the value of clean water by examining how property prices depend on proximity to clean water everything else equal whereas the travel cost method mainly has been used to estimate recreation values such as access to kayaking fishing etc examples of the sp techniques are contingent valuation and discrete choice experiments based on hypothetical scenarios they are able to elicit individual wtp for a large range of goods and services like access to safe water better tasting water secure access to water and recreational values