 
 <prompt> Wetin be di last word for di passage? Given di previous question, write one context wey get di answer. E fit be 1 - 20 sentences. Context: <response>: ```Despite the dominance of the above formula, there dey documented attempts of the financial industry, wey happen before the crisis, to address the formula limitations, specifically the lack of dependence dynamics and the poor representation of extreme events. The volume "Credit Correlation: Life After Copulas", wey dem publish for 2007 by World Scientific, summarize one 2006 conference wey Merrill Lynch hold for London where several practitioners try propose models wey go correct some of the copula limitations. See also the article by Donnelly and Embrechts and the book by Brigo, Pallavicini and Torresetti, wey report relevant warnings and research on CDOs wey appear for 2006.``` 