the current paper examines intertemporal capital asset pricing model in iran’s stock market. dynamic conditional correlation was used to estimate conditional variance and covariance portfolios with market returns. time varying beta is estimated by kalman filter method. based on the obtained results, risk aversion coefficients were between 0.013 and 0.28 and the average was 0.20. significance of...

The study of risk aversion of an agent confronted by a risk situations with several parameters is an important topic of risk theory. It is tackled traditionally with probabilistic methods. When these do not offer an appropriate shaping we can use Zadeh’s possibility theory . In this paper a possibilistic model of risk aversion with several parameters is proposed. The notion of possibilistic ris...

The classic Allingham and Sandmo’s (Journal of Public Economics, 1 (1972) 323–338) portfolio choice approach to income tax evasion has been increasingly criticised because it requires an ‘excess’ degree of risk aversion to explain the observed rate of tax compliance. In this paper we argue that there may not necessarily be ‘excess risk aversion’; and that the evidence can be explained by the di...

This paper explores whether there is one unifying concept of utility, as commonly assumed in applied and empirical economics, or whether utility is context-specific, as typically assumed in economic theory. We present a new method to measure the utility for gains, the utility for losses, and loss aversion both for risk and for time. Utility under risk was significantly more curved than utility ...

Within the expected-utility framework, the only explanation for risk aversion is that the utility function for wealth is concave: A person has lower marginal utility for additional wealth when she is wealthy than when she is poor. This paper provides a theorem showing that expected-utility theory is an utterly implausible explanation for appreciable risk aversion over modest stakes: Within expe...

Using subjective well-being data for more than 91,000 individuals in 30 OECD countries, 1990-2008, we study how people’s implicit aversion towards inflation varies with income and other socio-economic characteristics. While inflation aversion decreases with income, it increases with the education level. Contrary to previous findings using statedpreference methods, these relationships apply not ...

The paper discusses criteria for comparing risk aversion of decision makers when outcomes are multidimensional. A weak concept, ”commodity specific greater risk aversion”, is based on the comparison of risk premia paid in a specified commodity. A stronger concept, ”uniformly greater risk aversion” is based on the comparison of risk premia regardless of what commodities are used for payment. Nei...

In this paper, ambiguity aversion to uncertain survival probabilities is introduced in a life-cycle model with a bequest motive to study the optimal demand for annuities. Provided that annuities return is sufficiently large, and notably when it is fair, positive annuitization is optimal in the ambiguity neutrality limit case. Conversely, the optimal strategy is to sell annuities in case of infi...

This paper presents a context-dependent theory of decision under risk. The relevant contextual factor is the presence of a riskless lottery in a preference comparison. The theory only deviates from expected utility if the set of options contains both riskless and risky lotteries. The main motivation for the theory is to explain the gambling effect. Contrary to previous theories of the gambling ...