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Department of Agricultural Economics, Kiel University, Olshausenstraße 40, D-24098 Kiel, Germany. Email: [email protected]

Center for Environmental Economics and Policy, The University of Western Australia; 35 Stirling Highway, Crawley WA 6009, Australia. Email: [email protected]

Department of Agricultural Economics, Kiel University, Germany; Olshausenstraße 40, D-24098 Kiel, Germany. Email: [email protected]

Department of Agricultural and Resource Economics, The University of Western Australia; 35 Stirling Highway, Crawley WA 6009, Australia