Evidence of strong opposition to wilderness proposals in Utah suggeste
d that the non-market value of retaining those areas in multiple use m
anagement might be significant. A contingent value analysis of both su
pporters and opponents of the two major proposals for wilderness desig
nation in Utah indicated that there existed significant non-market wil
lingness to pay on the part of opponents, and that standard contingent
valuation practice which does not explicitly consider these values co
uld lead to a mis-estimation of aggregate willingness to pay.