Accounting for risk aversion, income distribution and social welfare in cost-benefit analysis for flood risk management

Research output: Contribution to JournalArticleAcademicpeer-review


Most cost-benefit analysis (CBA) textbooks and guidelines recognize the objective of CBAs to improve social welfare—a function of well-being of all individuals, conceptualized by utility. However, today's common practice to value flood risk management benefits as the reduction of the expected annual damages does not comply with this concept of social welfare, since it erroneously focuses on money instead of well-being (utility). Diminishing marginal utility of money implies that risk aversion and income differences should be taken into account while calculating the social welfare benefits of flood risk management. This is especially important when social vulnerability is high, damage compensation is incomplete and the distribution of income is regarded as unfair and income is not redistributed in other ways. Disagreement, misconception, complexity, untrained professionals, political economy and failing guidance are potential reasons why these concepts are not being applied. Compared to the common practice, a theoretically more sound social welfare approach to CBA for flood risk management leads to different conclusions on who to target, what to do, how much to invest and how to share risks, with increased emphasis on resiliency measures for population segments with low income and high social vulnerability. The social welfare approach to CBA, illustrated in this study in the context of floods, can be applied to other climate risks as well, such as storms, droughts, and landslides. WIREs Clim Change 2017, 8:e446. doi: 10.1002/wcc.446. For further resources related to this article, please visit the WIREs website.

Original languageEnglish
Article numbere446
Number of pages20
JournalWiley Interdisciplinary Reviews. Climate Change
Issue number2
Publication statusPublished - 2017


The authors wish to acknowledge the financial support received from the Dutch Ministry of Infrastructure and the Environment, the European Union (research projects Bottom-Up Climate Adaptation Strategies Towards a Sustainable Europe [BASE; FP7] and Green Win [Horizon 2020]), Deltares and the Netherlands Organisation for Scientific Research (NWO). We thank Stéphane Hallegate and two anonymous reviewers for useful comments on an earlier version of this manuscript.

FundersFunder number
Stéphane Hallegate
Horizon 2020 Framework Programme308337, 642018
Seventh Framework Programme
European Commission
Nederlandse Organisatie voor Wetenschappelijk Onderzoek
Ministerie van Infrastructuur en Milieu
Horizon 2020


    Dive into the research topics of 'Accounting for risk aversion, income distribution and social welfare in cost-benefit analysis for flood risk management'. Together they form a unique fingerprint.

    Cite this