A literature search provides 83 studies from which 616 comparisons of contingent valuation (CV) to revealed preference (RP) estimates are made.Summary statistics of the CV/RP ratios are provided for the complete dataset, a 5% trimmed dataset, and a weighted dataset that gives equal weight to each study rather than each CV /RP comparison.For the complete dataset, the sample mean CV/RP ratio is 0.89 with a 95% confidence interval [0.81-0.96]and a median of 0.75.For the trimmed and weighted dat:asets, these sumrnarJ statistics are (0.77; [0.74~0.81];0.75) and (0.92; [0.81-1.03];0.94), respectively.Tne Spearman rank correlation coefficients between the CV and RP estimates for the three datasets are 0.78, 0.88, and 0.92, respectively, with the Pearson correlations a bit larger.Non-parametric density estimates are provided, as well as the results of regressions of the observed CV /RP ratios on the basic RP technique used and the broad class of goods valued.
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