[1] Univ Queensland, Ctr Social Responsibil Min, Sustainable Minerals Inst, 47A Staff House Rd, St Lucia, Qld 4072, Australia
[2] Univ Queensland, UQ Business Sch, St Lucia, Qld, Australia
[3] Univ Helsinki, Dept Econ & Management, Helsinki, Finland
[4] Christian Heritage Coll, Mansfield, Qld, Australia