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I will be giving a talk at ESSEC (in La Défense) on Thursday morning, on "extremes and dependence in the context of Solvency II for insurance companies". Slides are already available here.    Slides essec  from Arthur Charpentier With Solvency II, insurance companies need to get a better understanding about correlations between different lines of business, especially when about extremal correlation since the interest is about solvency.For instance, QIS3 reports explains that "In view of the insufficiency of currently available data, the setting of these correlation coefficients will necessarily include a certain degree of judgment. This is also true because, when selecting correlation coefficients, allowance should be made for non-linear tail correlation, which is not captured under a ?pure? linear correlation approach. To allow for this, the correlations used should be higher than simple analysis of relevant data would indicate."In this talk will discuss tail dependence, and the link between tail dependence and risk measures of aggregate risks.At the same time, in Rennes, Benoît le Maux will be presenting our paper on "insuring natural catastrophes: should government intervene ?". Since the work is still in progress, and not submited, I will not upload the slides... but the paper should be finished soon.