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We propose an iterative procedure to efficiently estimate models with complex log-likelihood functions and the number of parameters relative to the observations being potentially high. Given consistent but inefficient estimates of sub-vectors of the parameter vector, the procedure yields...
Persistent link: https://www.econbiz.de/10010237679
. In order to describe such situations, copula-based models have been studied during the last year. In this paper, we …
Persistent link: https://www.econbiz.de/10010238359
We propose an iterative procedure to efficiently estimate models with complex log-likelihood functions and the number of parameters relative to the observations being potentially high. Given consistent but inefficient estimates of sub-vectors of the parameter vector, the procedure yields...
Persistent link: https://www.econbiz.de/10010235324
specified gravity equations are estimated by Copula-based Markov switching seemingly unrelated regression approach. The best … Student's t copula is applied for joint distribution. Analyzing the bilateral trade flow is separated into two situations …
Persistent link: https://www.econbiz.de/10012168770
In practice, multivariate dependencies between extreme risks are often only assessed in a pairwise way. We propose a test to detect when tail dependence is truly high{dimensional and bivariate simplifications would produce misleading results. This occurs when a significant portion of the...
Persistent link: https://www.econbiz.de/10010402973
In practice, multivariate dependencies between extreme risks are often only assessed in a pairwise way. We propose a test for detecting situations when such pairwise measures are inadequate and give incomplete results. This occurs when a significant portion of the multivariate dependence...
Persistent link: https://www.econbiz.de/10011414706
fundamental characteristic. We compare our empirical findings with a single Gaussian copula, a correlation-weighted average of … Gaussian copulas, the K-copula which directly addresses the nonstationarity of dependencies as a model parameter, and the … skewed Student's t-copula. The K-copula covers the empirical dependence structure on the local scale most adequately, whereas …
Persistent link: https://www.econbiz.de/10012842121
promising class of models are the hierarchical Archimedean copulae (HAC) that allow for non-exchangeable and non … for stock indices the copula parameter changes dynam- ically but the hierarchical structure is constant over time …. Interestingly in our exchange rate example both structure and parameters vary dynamically. -- copula ; multivariate distribution …
Persistent link: https://www.econbiz.de/10003953027
Consider a random sample in the max-domain of attraction of a multivariate extreme value distribution such that the dependence structure of the attractor belongs to a parametric model. A new estimator for the unknown parameter is defined as the value that minimises the distance between a vector...
Persistent link: https://www.econbiz.de/10013130231
We consider the problem of estimating the marginals in case there is knowledge on the copula. If the copula is smooth … convergence n-1/2, but a smaller asymptotic variance. In this paper we show that smoothness assumptions on the copula are … necessary: we construct both a (non-smooth) copula and, exploiting the information our copula provides, estimators of the …
Persistent link: https://www.econbiz.de/10013135506