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Charity hazard and the flood insurance protection gap: An EU scale assessment under climate change

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  • Tesselaar, Max
  • Botzen, W.J. Wouter
  • Robinson, Peter J.
  • Aerts, Jeroen C.J.H.
  • Zhou, Fujin

Abstract

The flood insurance protection gap, the level of uninsured flood risk, is a problem faced by many European countries and is expected to increase due to climate change. In some countries a cause of low demand for flood insurance is the crowding out of private insurance uptake due to the anticipation of government compensation for uninsured damage, a phenomenon known as charity hazard. This study applies a partial equilibrium model of flood insurance markets to explore the extent of charity hazard and the insurance protection gap for EU-countries until 2050. For this analysis, we apply an expected utility framework with insurance purchase decision functions that capture the probability, ambiguity and extent of government compensation. By accounting for country-level insurance systems and government compensation types, as well as regional flood risk, we aim to assess how charity hazard develops under different conditions. The extent of charity hazard decreases with uncertainty of government compensation, as well as with higher flood risk. Considering current and future conditions, the highest impact of charity hazard is observed in regions of Germany and Italy. The projected insurance protection gap is highest in Germany, followed by Spain, Poland and Italy, and is expected to grow towards 2050.

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  • Tesselaar, Max & Botzen, W.J. Wouter & Robinson, Peter J. & Aerts, Jeroen C.J.H. & Zhou, Fujin, 2022. "Charity hazard and the flood insurance protection gap: An EU scale assessment under climate change," Ecological Economics, Elsevier, vol. 193(C).
    • Handle: RePEc:eee:ecolec:v:193:y:2022:i:c:s0921800921003487
    DOI: 10.1016/j.ecolecon.2021.107289
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    2. Fluhrer, Svenja, 2023. "Crowding-in or crowding-out: The effect of humanitarian aid on households’ investments in climate adaptation," MPRA Paper 117975, University Library of Munich, Germany.
    3. Paul Hudson & Annegret H. Thieken, 2022. "The presence of moral hazard regarding flood insurance and German private businesses," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 112(2), pages 1295-1319, June.
    4. Max Tesselaar & W. J. Wouter Botzen & Timothy Tiggeloven & Jeroen C. J. H. Aerts, 2023. "Flood insurance is a driver of population growth in European floodplains," Nature Communications, Nature, vol. 14(1), pages 1-14, December.

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