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NATIONAL BUREAU OF ECONOMIC RESEARCH
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Martin Karlsson

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Institutional Affiliation: University of Duisburg-Essen

NBER Working Papers and Publications

March 2020Long-Term Health Insurance: Theory Meets Evidence
with Juan Pablo Atal, Hanming Fang, Nicolas R. Ziebarth: w26870
To insure policyholders against contemporaneous health expenditure shocks and future reclassification risk, long-term health insurance constitutes an alternative to community-rated short-term contracts with an individual mandate. Relying on unique claims panel data from a large private insurer in Germany, we study a real-world long-term health insurance application with a life-cycle perspective. We show that German long-term health insurance (GLTHI) achieves substantial welfare gains compared to a series of risk-rated short-term contracts. Although, by its simple design, the premium setting of GLTHI contract departs significantly from the optimal dynamic contract, surprisingly we only find modest welfare differences between the two. Finally, we conduct counterfactual policy experiments to ...
June 2017Exit, Voice or Loyalty? An Investigation into Mandated Portability of Front-Loaded Private Health Plans
with Juan Pablo Atal, Hanming Fang, Nicolas R. Ziebarth: w23468
We study theoretically and empirically how consumers in an individual private long-term health insurance market with front-loaded contracts respond to newly mandated portability requirements of their old-age provisions. To foster competition, effective 2009, German legislature made the portability of standardized old-age provisions mandatory. Our theoretical model predicts that the portability reform will increase internal plan switching. However, under plausible assumptions, it will not increase external insurer switching. Moreover, the portability reform will enable unhealthier enrollees to reoptimize their plans. We find confirmatory evidence for the theoretical predictions using claims panel data from a big private insurer.

Published: Juan Pablo Atal & Hanming Fang & Martin Karlsson & Nicolas R. Ziebarth, 2019. "Exit, Voice, or Loyalty? An Investigation Into Mandated Portability of Frontā€Loaded Private Health Plans," Journal of Risk and Insurance, vol 86(3), pages 697-727. citation courtesy of

 
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