    ‘Sentence 42 In. other vases, we. smust rely on  sirvey” approaches to estimate: WIP, vsvally  Throigh variant of the contingent valuation  approach, ‘which - generally *invalves’ ‘directly.  questioning: tespondents for . their ‘WIP ini  hypathetioél. market. sitvations    Sentence 2: Hypothetical market sitvations  aré uniform acrass all respondents: