This paper considers horizon effects on portfolio weights under time varying and forecastable return volatility. The return volatility is modelled as a GARCH-M, which is general enough to encompass both constant and time varying mean. The analysis confirms earlier results, namely that there are no horizon effects when the stochastic process, that governs asset returns, has constant mean. Howeve...

Using data on Uruguayan adolescents, we estimate peer effects in risk attitudes. Relative risk aversion is elicited in an experimental setting. Identification is based on parents not being able to choose the class within the school of their choice. After controlling for school-grade fixed effect and addressing endogeneity due to simultaneity, we find a significant and quantitative large impact ...

Firms devising green investment strategies within a deregulated environment must take into account not only economic and technological uncertainty, but also strategic interactions due to competition. Also, further complicating decisions is the fact that firms are likely exhibit risk aversion, since alternative energy technologies entail cannot be diversified. Therefore, we develop utility-based...

On a capital market the social group is formed from traders. Individual behaviour of agents is influenced by the need to associate with other agents and to obtain the approval of other agents in the group. Making decisions an individual equates own needs with those of the other agents from the group. Any two agents from the group may interact. The interaction consists of the exchange of informa...

This paper presents a dynamic portfolio choice model to analyze the liquidity premium necessary to compensate an investor for the adverse price impact of trading. By calibrating the model to empirically reasonable parameter values, we generate a plausible liquidity premium. Specifically, the premium is an increasing, concave function of price impact. It increases with the investor’s initial wea...

We study optimal consumption and portfolio choice in a framework where investors adjust their labor supply through an irreversible choice of their retirement time. We show that investing for early retirement tends to increase savings and reduce an agent’s effective relative risk aversion, thus increasing her stock market exposure. Contrary to common intuition, an investor might find it optimal ...

Stability of preferences is central to how economists study behavior. This paper uses panel data on hypothetical gambles over lifetime income in the Health and Retirement Study to quantify changes in risk tolerance over time and differences across individuals. Maximum-likelihood estimation of a correlated random effects model utilizes information from 12,000 respondents in the 1992-2002 HRS. Th...

In a continuous-time economy with complete markets, we show how the heterogeneity in the individual consumers’ risk attitudes and impatience would affect the representative consumer’s counterparts. Specifically, our formulas tell us how his risk tolerance and impatience will change over time, and how his impatience will be affected by the changes in aggregate consumption levels. Under the assum...

A univariate real-valued function is said to be completely monotone if it takes positive values and alternate the signs of its higher order derivatives, starting from everywhere negative first derivatives. We prove that the representative consumer’s discount factor of a continuous-time economy under uncertainty is a power function of some completely monotone function of time satisfying certain ...