Paul Watkiss and Alistair Hunt 6.1 INTRODUCTION In this chapter we set out some key considerations with respect to assessment methods for climate- esilient development. A key focus has been to r capture the changes that have occurred over recent years in three areas: (1) the framing of adaptation; (2) methodological challenges; and (3) considering uncertainty in economic appraisal. In each case, we summarize the current state of knowledge and emerging thinking on assessment methods. The chapter proceeds as follows. In Section 6.2 we outline a number of important challenges for the assessment of climate- esilient development, r highlighting the lack of relevance of older studies, and how these issues are now being addressed. In Section 6.3 we update the state of knowledge on a number of the key methodological challenges for adaptation assessment, highlighting that with mainstreaming, many of these are reduced. In Section 6.4 we investigate the methods that are being adopted for economic appraisal of adaptation, extending existing approaches to address uncertainty. Conclusions are presented in Section 6.5. 6.2 POLICY RELEVANCE AND ADAPTATION ASSESSMENT Most of the earlier literature on the economics of adaptation used scenario- ased ‘impact assessment’ (see Markandya and Watkiss, 2009). b Such studies adopt a logical, scientific and sequential approach, starting with global future socio-conomic scenarios and climate model projece tions, then assessing future impacts and costs from climate change. The analysis of adaptation is then considered as the final step in this chain, with the potential consideration of costs and benefits, and...
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