机译:非法毒品和中产阶级的衰落
Univ Fribourg Dept Econ Bd Perolles 90 CH-1700 Fribourg Switzerland;
Univ Goettingen Dept Econ Pl Goettinger Sieben 3 D-37073 Gottingen Germany;
Socio-economic deprivation; Illicit drugs; Mental distress; Middle class; Health insurance;