Eventually this could become a significant drag on the economy. In the literature review provided here, it appears that, at the level of individual sectors, this relatively inelastic response to water scarcity is indeed prevalent. However, it remains to be seen what scope there is for the economy to substitute more aggressively away from water intensive activities and consumption goods. Quantifying this potential should be part of the research agenda undertaken with the kind of global CGE model discussed in this report.