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Acknowledgement: We are indebted to eleven reviewers whose critical and constructive comments helped to improve earlier versions of the papers in this special issue. Previous versions of the papers were presented at the International Symposium on “Interdependencies between upland and lowland agriculture and resource management” held at the University of Hohenheim, Stuttgart, Germany, from 1–4 April 2008. The financial support of the German Research Foundation (Deutsche Forschungsgemeinschaft – DFG) towards the editing costs of this special issue is gratefully acknowledged.

Rewarding the upland poor for saving the commons? Evidence from Southeast Asia