In this paper we examine the effect of stochastic volatility on optimal portfolio choice in both partial and general equilibrium settings. In a partial equilibrium setting we derive an analog of the classic Samuelson–Merton optimal portfolio result and define volatility-adjusted risk aversion as the effective risk aversion of an individual investing in an asset with stochastic volatility. We ex...

BACKGROUND Anxiety disorders are associated with disruptions in both emotional processing and decision making. As a result, anxious individuals often make decisions that favor harm avoidance. However, this bias could be driven by enhanced aversion to uncertainty about the decision outcome (e.g., risk) or aversion to negative outcomes (e.g., loss). Distinguishing between these possibilities may ...

Using the notion of risk aversion, this study explores decisions teachers make when constructing a curriculum. Adopting qualitative, grounded approach, used semi-structured interviews with nine history to examine they were making during period considerable curriculum change in England. Five key categories identified, which then defined as averse or high risk. The findings show that largely adop...

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 ...