Climate change and climate uncertainty in the Murray-Darling Basin David Adamson 1 , Thilak Mallawaarachchi 2 and John Quiggin 3 AARES 2007 51st Annual Conference of the Australian Agricultural and Resource Economics Society Queenstown, New Zealand, 13-16 February 2007 1 RSMG, School of Economics, University of Queensland, St Lucia Qld 4072, Australia, e-mail: d.adamson@uq.edu.au 2 ABARE, GPO Box 1563, Canberra 2601, Australia, e-mail: Thilak.Mallawaarachchi@abare.gov.au 3 RSMG, School of Economics, University of Queensland, St Lucia Qld 4072, Australia, e-mail: j.quiggin@uq.edu.au