212678document769431-s2.0-S0305750X15312559-main.pdfapplication/pdf50bcff81781e783ba6a8226f51aecb26MD59913712017-04-04 13:37:13https://pure.iiasa.ac.at/id/eprint/14520/1/1-s2.0-S0305750X15312559-main.pdf