search query: @author Sigman, H. / total: 2
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1.
International Spillovers and Water Quality in Rivers: Do Countries Free Ride?
American Economic Review
2002 : SEP, VOL. 92:4, p. 1152-1159
 2002 Sigman, H.
2.
The cost of reducing municipal solid waste
Journal of Environmental Economics and Management
1997 : JUN, VOL. 33:2, p. 128-150
 1997 Palmer, K.
Sigman, H.
Walls, M.
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