机构:
Stockholm Sch Econ, Dept Econ, S-11383 Stockholm, Sweden
Ctr Environm & Resource Econ CERE, Umea, SwedenStockholm Sch Econ, Dept Econ, S-11383 Stockholm, Sweden
Johansson, Per-Olov
Kristrom, Bengt
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机构:
Ctr Environm & Resource Econ CERE, Umea, Sweden
SLU, Dept Forest Econ, S-90183 Umea, SwedenStockholm Sch Econ, Dept Econ, S-11383 Stockholm, Sweden