Abstract. In the context of time varying utility of wealth, this paper analyzes risk behavior in the case of a Decision Maker who can differently act as a Buyer or a Seller in order to study the appealing concept of size-of-risk attitude. Sufficient conditions ensuring existence and regularity of the proposed definitions are presented, both in the case of temporal size-of-risk aversion both in the case of instantaneous size-of-risk aversion. Sufficient conditions ensuring such behaviors are then investigated.

Received: August 26, 2013

AMS Subject Classification: 91B06, 91B16, 90B50

Key Words and Phrases: size-of-risk attitude, temporal utility, Buyer-Seller viewpoints

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