Comparative risk attitude and the aggregation of single-crossing

Gregorio Curello, Ludvig Sinander and Mark Whitmeyer

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Abstract: In choice under risk, there is a standard notion of 'less risk-averse than', due to Yaari (1969). In the theory of comparative statics, the single-crossing property is satisfied by all weighted averages of a family of single-crossing functions if and only if the family satisfies a property called signed-ratio monotonicity (Quah & Strulovici, 2012). We establish a close link between 'less risk-averse than' and signed-ratio monotonicity.

Date: 2025-12
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