### Description

I am a professor of Statistics at Universit Paris Dauphine, with two teenage kids who are taking a lot of my free time, a definitely unhealthy but so far not fatal) fascination for mountains and (easy) climbing, in particular for Scotland in Winter, an almost-daily run, and a reading list mainly centered at fantasy books? Hence the categories on this blog (or 'og, because 'log and b'og did not sound good). The Statistics posts will be mainly centered on computational and Bayesian topics, on papers or preprints I find of interest (or worth criticising), and on the occasional trip abroad to a research center or to a conference.

### Xi'an's Og's Latest Posts

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Following the highly successful [authorised opinion!, from objective sources] MCMski IV, in Chamonix last year, the BayesComp section of ISBA has decided in favour of a two-year period, which means the great item of news that next year we will meet again for MCMski V [or MCMskv for short], this time on the snowy slopes […]

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Filed under: Books, Kids, pictures Tagged: Andrew Gelman, atheism, Friedrich Nietzsche, graphical novel, Maximilien Le Roy, Michel Onfray, Philosophenweg

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A self-study question on X validated exposed an interesting property of the Beta distribution: If x is B(n,m) and y is B(n+½,m) then √xy is B(2n,2m) While this can presumably be established by a mere change of variables, I could not carry the derivation till the end and used instead the moment generating function E[(XY)s/2] […]

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I am off to New York City for two days, giving a seminar at Columbia tomorrow and visiting Andrew Gelman there. My talk will be about testing as mixture estimation, with slides similar to the Nice ones below if slightly upgraded and augmented during the flight to JFK. Looking at the past seminar speakers, I […]

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Today, I got two FedEx envelopes in the mail, both apparently from the same origin, namely UF Statistics department reimbursing my travel expenses. However, once both envelopes opened, I discovered that, while one was indeed containing my reimbursement cheque, the other one contained several huge cheques addressed to… a famous Nova Scotia fiddler, Natalie MacMaster, […]

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