The Dirichlet distribution is sometimes said that it is "too restrictive and imposes strong conditions on the dependence between components". What is the reason?
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what restrictions and conditions does the dirichlet impose – develarist Aug 30 '20 at 09:59
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@develarist For example, the correlation structure of a Dirichlet composition is negative: if x has a Dirichlet distribution, corr(x_i, x_j) < 0 for every i neq j. Is it true? – Tky Aug 30 '20 at 11:14