We use the new version of the GTAP-W model to analyze the economy-wide impacts of enhanced irrigation efficiency. The … to improvements in irrigation efficiency in water-stressed regions is not beneficial for all. For water-stressed regions … and mostly negative. Global water savings are achieved. Not only regions where irrigation efficiency changes are able to …

equity. This paper introduces three ways to consider efficiency and equity simultaneously. The first method, inspired by Kant … are reduced so as to equalise total costs and benefits of climate change over the world and over time. Emission reductions … are substantial. This method approximately preserves the inequities that would occur in a world without climate change …