Therefore, Beta ( 1 / 2, 1 / 2 ) not only is Jeffreys prior for the Bernoulli and binomial distributions, but also seems to be the Berger-Bernardo-Sun reference prior for the asymmetric triangular distribution ( for which the Jeffreys prior does not exist ), a distribution used in project management and PERT analysis to describe the cost and duration of project tasks.
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