Article history: Received 6 February 2008 Accepted 14 May 2008 Available online 20 May 2008 JEL classification: C63 G11 G31 G39

Article history: Received 29 July 2008 Accepted 29 August 2008 Available online 5 September 2008 JEL classification: G11 G10 C61 G19

Article history: Received 7 May 2012 Received in revised form 6 November 2012 Accepted 9 November 2012 Available online 17 November 2012 JEL classification: D81 Q40 G11

We use unique institutional securities holdings data to examine the trading behaviour of delegated capital and its impact on bond risk premia. show that fund managers trade strongly procyclically: they actively move into higher yielding, longer duration lower rated as yields fall spreads compress, vice versa. Funds more exposed negative increase their risk-taking strongly, this effect is partic...

We develop a multivariate generalization of the Markov–switching GARCH model introduced by Haas, Mittnik, and Paolella (2004b) and derive its fourth– moment structure. An application to international stock markets illustrates the relevance of accounting for volatility regimes from both a statistical and economic perspective, including out–of–sample portfolio selection and computation of Value– ...

Owner-managers of private companies are often highly underdiversified. We investigate the consequences of underdiversification at the company level. There is a strong positive relationship between underdiversification, measured as the share of personal net worth invested in the company, and profitability, measured as the return on equity. The analysis identifies two causes for this underdiversi...

This paper proposes differentiability properties for positively homogeneous risk measures which ensure that the gradient can be applied for reasonable risk capital allocation on non-trivial portfolios. It is shown that these properties are fulfilled for a wide class of coherent risk measures based on the mean and the one-sided moments of a risky payoff. In contrast to quantile-based risk measur...

We study the representative consumer’s risk attitude and efficient risk-sharing rules in a singleperiod, single-good economy in which consumers have homogeneous probabilistic beliefs but heterogeneous risk attitudes. We prove that if all consumers have convex absolute risk tolerance, so must the representative consumer. We also identify a relationship between the curvature of an individual cons...

In a finite time horizon, incomplete market, continuous-time setting with dividends and investor incomes governed by arithmetic Brownian motions, we derive closed-form solutions for the equilibrium risk-free rate and stock price for an economy with finitely many heterogeneous CARA investors and unspanned income risk. In equilibrium, the Sharpe ratio is the same as in an otherwise identical comp...

We investigate the implications of technological innovation and non-diversifiable risk on entrepreneurial entry and optimal portfolio choice. In a real options model where two risk-averse individuals strategically decide on technology adoption, we show that the impact of non-diversifiable risk on the option timing decision is ambiguous and depends on the frequency of technological change. Compa...