This text presents the state of the art in the theory and practice of environmental valuation and resource management. Experts in the field present methodological and empirical evidence for applying valuation methods to ecological policy problems. The methodological contributions examine such themes as uncertainty, distributional conflict, positional analysis, weak comparability and the need for collective solutions to environmental problems. Case studies are incorporated to support these theoretical reflections and a number of empirical studies are used to demonstrate and evaluate valuation practices in a variety of institutional and policy settings.