Interactions between Social and Topping Up Insurance under ex-post Moral Hazard

Rosalind Bell-Aldeghi

MPRA Paper from University Library of Munich, Germany

Abstract: As health expenditure and need for corresponding funding rises, resorting to topping up insurance can seem natural. Complementary and supplementary insurances are both topping up contracts and, as such, are treated as one in the theoretical literature on optimal insurance. We argue that distinguishing them is crucial, and should be considered carefully when defining policies impacting the structure of the health insurance system, as these two kinds of insurance can have opposite effects on social insurance coverage. \indent In this model, the optimal social insurance rate is defined endogenously and varies according to redistribution and the ex-post moral hazard characteristics of the insurance. This game has three stages and is solved through backward induction. The optimal social insurance rate is chosen first, by maximising social welfare. Second, individuals choose their private complementary and supplementary contracts. In the third stage they decide on their level of labour and consumption of health and other goods. \indent Results indicate that whereas the presence of complementary insurance decreases the optimal size of social insurance, the offset effects of supplementary insurance can improve welfare.

Keywords: Social insurance; health insurance; ex-post moral hazard; topping up; redistribution. (search for similar items in EconPapers)
JEL-codes: D82 I13 I18 (search for similar items in EconPapers)
Date: 2019-02
New Economics Papers: this item is included in nep-cta, nep-gth and nep-ias
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https://mpra.ub.uni-muenchen.de/92445/1/MPRA_paper_92445.pdf revised version (application/pdf)
https://mpra.ub.uni-muenchen.de/92660/1/MPRA_paper_92445.pdf revised version (application/pdf)

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