Risk aversion is one of the main themes in risk theory. Risk theory is treated usually by probability theory. The aim of this paper is to propose an approach of the risk aversion by possibility theory initiated by Zadeh in 1978 as an alternative of probability theory in the modeling of uncertain situations. The main notions studied in this paper are the possibilistic risk premium and the possib...

Is the pain of a loss greater in magnitude than pleasure comparable gain? Studies that compare positive feelings about gain with negative have found mixed answers to this question. The can be than, less or equal gain. We offer new approach test hedonic aversion. This method uses emotional reactions reference point, change, and change. When we manipulated point (i.e., pleasurable painful), two d...

We show how optimal saving in a two-period model is affected when prudence and risk aversion of the underlying utility function change. Increasing prudence alone will induce higher savings only if, for certain combinations of the interest rate and the pure time discount rate, there is distributional neutrality between the two periods. Otherwise, changes of risk aversion that affect the distribu...

By using a general bivariate utility function, this paper provides the conditions under which agents would like to remove primary risk in the presence of other dependent risk. For small risks, the conditions for retaining primary risk along with other dependent risk are also provided. The results of this paper indicate that the risk attitude to primary risk depends not only on the dependence re...

The theory of subjective expected utility has been recently extended to allow ambiguity to matter for choice. We propose a notion of absolute ambiguity aversion by building on a notion of comparative ambiguity aversion. We characterize it for a preference model which encompasses some of the most popular models in the literature. We next build on these ideas to provide a definition of unambiguou...

We provide a condition for rationalizability by risk-averse expected utility preference in a demand-based framework with multiple commodities, which is a UNCAF statement in the sense of Chambers et al. (2014). Our test can be viewed as a natural counterpart of a classical test of expected utility, due to Fishburn (1975), in a demand setting.

In this article, an individual’s tax-exempt bond porrfolio decision is investigated. A model capturing the relationship between income uncertainty and optimal portfolio choice is defined when an individual decision-maker has the opportunity to hold higher yielding private-activity bonds. The findings in this article show that in most cases risk-averse individuals will maximize the expected util...

Many industries are exposed to weather risk. Weather derivatives can play a key role in hedging and diversifying such risk because the uncertainty in a company’s profit function can be correlated to weather condition which affects diverse industry sectors differently. Unfortunately the weather derivatives market is a classical example of an incomplete market that is not amenable to standard met...

We provide a random variable characterization of the necessary and sufficient conditions for a shift of the distribution of rate of return on the risky asset in the two asset portfolio problem to reduce demand for all risk–averse expected utility maximizing investors. We provide random variable characterizations of the shifts that reduce both demand and expected utility for all risk–averse inve...

When an asset is completely liquid, an investor can realize his desirable strategy. But when the asset is not sufficiently liquid, the investor cannot trade the asset continuously and his strategy is restricted. He has to consider the risk of the failure of the trade. In this paper a risky asset is traded at the random times and an investor has a power utility function. In this situation we sol...