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In this paper we consider several time-varying volatility and/or heavy-tailed models to explain the dynamics of return time series and to fit the volatility smile for exchange-traded options where the underlying is the main �Borsa Italiana� stock index. Given observed prices for the...
Persistent link: https://www.econbiz.de/10011099609
Most of the important models in finance rest on the assumption that randomness is explained through a normal random variable because, in general, the use of alternative models is obstructed by the difficulty of calibrating and simulating them. In this paper, we empirically study models for...
Persistent link: https://www.econbiz.de/10011099611
This paper presents a general test of contagion in financial markets based on bivariate correlation analysis � a test … that can be interpreted as an extension of the normal correlation theorem. Contagion is defined as a structural break in … hypothesis of 'no contagion' can be rejected only if the variance of country specific shocks is set to levels that are not …
Persistent link: https://www.econbiz.de/10005467302
contagion over but these measures become less effective when the shock is very large, when the situation is best addressed by …
Persistent link: https://www.econbiz.de/10011099690
contagion. Our analysis includes indicators of domestic and external imbalances which were mostly disregarded by previous … creditworthiness of a sovereign borrower (wake-up-call contagion) and behaviour not linked to fundamentals (pure contagion). We find … evidence of wake-up-call contagion but not of pure contagion. …
Persistent link: https://www.econbiz.de/10011099707
More than three years since the outbreak of the sovereign debt crisis in the euro area the banking systems of several countries remain exposed to the vagaries of government bond markets. The paper analyzes the different channels through which sovereign risk affects banking risk (and vice versa),...
Persistent link: https://www.econbiz.de/10011100401
shocks. We first review the different definitions and measures of contagion used in the literature. We then use a simple … multi-country asset pricing model to cast the main elements of the current debate on contagion and provide a stylized … classification, we survey the results obtained in the empirical literature on contagion. …
Persistent link: https://www.econbiz.de/10005609346
distress and contagion are also confirmed by many recent empirical studies. By contrast, according to empirical analyses, the …
Persistent link: https://www.econbiz.de/10005609360
We consider a difference-in-differences setting with a continuous outcome, such as wages or expenditure. The standard practice is to take the logarithm of the outcome and then interpret the results as an approximation of the multiplicative treatment effect on the original outcome. We argue that...
Persistent link: https://www.econbiz.de/10011099673
This paper studies the identification and estimation of treatment response with heterogeneous spillovers in a network model. We generalize the standard linear-in-means model to allow for multiple groups with between and within-group interactions. We provide a set of identification conditions of...
Persistent link: https://www.econbiz.de/10011099681