Publications des institutions partenaires
Evaluating the density of ratios of noncentral quadratic forms in normal variables
Two computable expressions for the exact density of a ratio of quadratic forms in Gaussian random vectors are derived, one of which is restricted to special cases of the problem. Ratios of this type are ubiquitous in econometrics, but their density, unlike the corresponding cumulative distribution function, has not received much attention to date. The new algorithms complement those…
Institution partenaire
English / 15/02/2009
The leverage effect without leverage
We use experimental stock markets to add more evidence that Black's [1976. Proceedings of the 1976 Meeting of the Business and Economic Statistics Section. American Statistical Association, pp. 177–181] leverage effect in financial markets does not necessarily stem from the financial leverage of the firm. We surprisingly find a large number of markets in which the leverage…
Institution partenaire
English / 27/01/2009
Asymmetric multivariate normal mixture GARCH
An asymmetric multivariate generalization of the recently proposed class of normal mixture GARCH models is developed. Issues of parametrization and estimation are discussed. Conditions for covariance stationarity and the existence of the fourth moment are derived, and expressions for the dynamic correlation structure of the process are provided. In an application to stock market…
Institution partenaire
English / 09/01/2009
Young measure flow as a model for damage
Models for hysteresis in continuum mechanics are studied that rely on a time-discretised quasi-static evolution of Young measures akin to a gradient flow. The main feature of this approach is that it allows for local, rather than global minimisation. In particular, the case of a non-coercive elastic energy density of Lennard-Jones type is investigated. The approach is used to…
Institution partenaire
English / 01/01/2009
Look-ahead benchmark bias in portfolio performance evaluation
Performance of investment managers is predominantly evaluated against targeted benchmarks, such as stock, bond or commodity indices. However, most professional databases
do not retain timeseries for companies that disappeared, and do not necessarily track the change of constitution in these benchmarks. Consequently, standard tests of performance suffer from the “look-ahead…
Institution partenaire
English / 01/01/2009
Cash sub-additive risk measures and interest rate ambiguity
A new class of risk measures called cash sub-additive risk measures is introduced to assess the risk of future financial, nonfinancial and insurance positions. The debated cash additive axiom is relaxed into the cash sub-additive axiom to preserve the original difference between the numeraire of the current reserve amounts and future positions. Consequently, cash sub-additive risk…
Institution partenaire
English / 01/01/2009
Schweizer Private Banking Kunden - Eine Kundenbefragung mit speziellem Fokus auf die Kundenberatung im Internet
Vermögende Kunden weisen eine ausgeprägte Wertschätzung für persönliche Anlageberatung auf. Dies zeigt eine repräsentative Studie des Institutes für schweizerisches Bankenwesen der Universität Zürich. Befragt wurden Schweizer Private Banking Kunden sowie Kundenberater und Exponenten des Managements Schweizer Vermögensverwalter. Allerdings geht aus der Studie auch hervor, dass sich…
Institution partenaire
English / 01/01/2009
Mapping and structuring international financial regulation – A theoretical approach
Institution partenaire
English / 01/01/2009
Attitudes and behaviour in everyday finance: evidence from Switzerland
Purpose – In order to classify individuals based on their needs, this paper aims to consider both self-stated attitudes and behaviours in a comprehensive range of daily financial affairs. Furthermore, it aims to study the impacts of socio-demographic variables such as gender, age, and education.
Design/methodology/approach – A questionnaire was answered by 1,282 respondents in…
Institution partenaire
English / 01/01/2009
CHICAGO: A fast and accurate method for portfolio risk calculation
This paper shows how independent component analysis can be used to estimate the generalized orthogonal GARCH model in a fraction of the time otherwise required. The proposed method is a two-step procedure, separating the estimation of the correlation structure from that of the univariate dynamics, thus facilitating the incorporation of non-Gaussian innovations distributions in a…
Institution partenaire
English / 01/01/2009
Assessing and improving the performance of nearly efficient unit root tests in small samples
The development of unit root tests continues unabated, with many recent contributions using techniques such as generalized least squares (GLS) detrending and recursive detrending to improve the power of the test. In this article, the relation between the seemingly disparate tests is demonstrated by algebraically nesting all of them as ratios of quadratic forms in normal variables. By…
Institution partenaire
English / 01/01/2009
Settlement Finality and Financial Collateral Directives: ignored but crucial in financial turmoil
Institution partenaire
English / 01/01/2009
Prospect theory and mean-variance analysis: Does it make a difference in wealth management?
We show that prospect theory is a valuable paradigm for wealth management. It describes well how investors perceive
risk and with appropriate modeling it can be made consistent with rational decision making. Moreover, it can be
represented in a simple reward-risk diagram so that the main ideas are easily communicated to clients. Finally, we
show on data from a large…
Institution partenaire
English / 01/01/2009
Optimality of prompt corrective action in a continuous - time model with recapitalization possibility
Prompt Corrective Action (PCA) is a system of predetermined capital/asset ratios that trigger supervisory actions by a banking regulator. Our paper addresses the optimality of this regulation system by adapting a dynamic model of entrepreneurial fi?nance to banking regulation. In a dynamic moral hazard setting, we fi?rst derive the optimal contract between the banker and the…
Institution partenaire
English / 01/01/2009
Evolutionary Finance and Dynamic Games
The paper examines a game-theoretic evolutionary model of an asset market with endogenous equilibrium asset prices. Assets pay dividends that are partially consumed and partially reinvested. The investors use general, adaptive strategies (portfolio rules), distributing their wealth between assets, depending on the exogenous states of the world and the observed history of the game.…
Institution partenaire
English / 01/01/2009
How Time Preferences Differ: Evidence from 45 Countries
We present results from the first large-scale international survey on time discounting, conducted in 45 countries. Cross-country varia- tion cannot simply be explained by economic variables such as interest rates or inflation. In particular, we find strong evidence for cultural differences, as measured by the Hofstede cultural dimensions. For ex- ample, high levels of Uncertainty…
Institution partenaire
English / 01/01/2009
Operational risk quantification using extreme value theory and copulas: from theory to practice
Institution partenaire
English / 01/01/2009
Risk measures and efficient use of capital
This paper is concerned with clarifying the link between risk measurement and capital efficiency. For this purpose we introduce risk measurement as the minimum cost of making a position acceptable by adding an optimal combination of multiple eligible assets. Under certain assumptions, it is shown that these risk measures have properties similar to those of coherent risk measures. The…
Institution partenaire
English / 01/01/2009
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