Author: xi'an

easy Riddler

The riddle of the week is rather standard probability calculus If N points are generated at random places on the perimeter of a circle, what is the probability that you can pick a diameter such that all of those points are on only one side of the newly halved circle? Since it is equivalent to […]

a perfectly normally distributed sample

When I saw this title on R-bloggers, I was wondering how “more perfect” a Normal sample could be when compared with the outcome of rnorm(n). Hence went checking the original blog on bayestestR in search of more information. Which was stating nothing more than how to generate a sample is perfectly normal by using the […]

a perfectly normally distributed sample

When I saw this title on R-bloggers, I was wondering how “more perfect” a Normal sample could be when compared with the outcome of rnorm(n). Hence went checking the original blog on bayestestR in search of more information. Which was stating nothing more than how to generate a sample is perfectly normal by using the […]

and it only gets worse…

. ” The Texas state legislature is debating a provision that wouldn’t just outlaw abortion, but legally qualify it as homicide(…) This, incidentally, is exactly what pro-choice advocates warned about when they said that a law passed in the George W Bush era, the Unborn Victims of Violence Act, as well as the related state […]

Bertrand-Borel debate

On her blog, Deborah Mayo briefly mentioned the Bertrand-Borel debate on the (in)feasibility of hypothesis testing, as reported [and translated] by Erich Lehmann. A first interesting feature is that both B mathematicians discuss the probability of causes in the Bayesian spirit of Laplace. With Bertrand considering that the prior probabilities of the different causes are […]

abolitionist

A very interesting piece about prison abolition in the NYT. Centering on Ruth Wilson Gilmore an US advocate for the abolition of prison sentences and a geographer at Berkeley. Interesting because the very notion of abolition sounds anathema to many and I rarely meet people sharing the conviction that prison sentences are counter-productive, often in […]

MCMC importance samplers for intractable likelihoods

Jordan Franks just posted on arXiv his PhD dissertation at the University of Jyväskylä, where he discuses several of his works: M. Vihola, J. Helske, and J. Franks. Importance sampling type estimators based on approximate marginal MCMC. Preprint arXiv:1609.02541v5, 2016. J. Franks and M. Vihola. Importance sampling correction versus standard averages of reversible MCMCs in […]

PhD studenships at Warwick

There is an exciting opening for several PhD positions at Warwick, in the departments of Statistics and of Mathematics, as part of the Centre for Doctoral Training in Mathematics and Statistics newly created by the University. CDT studentships are funded for four years and funding is open to students from the European Union without restrictions. […]

did variational Bayes work?

An interesting ICML 2018 paper by Yuling Yao, Aki Vehtari, Daniel Simpson, and Andrew Gelman I missed last summer on [the fairly important issue of] assessing the quality or lack thereof of a variational Bayes approximation. In the sense of being near enough from the true posterior. The criterion that they propose in this paper […]

MaxEnt 2019

For those who definitely do not want to attend O’Bayes 2019 in Warwick,  the Max Ent 2019 conference is taking place at the Max Planck Institute for plasma physics in Garching, near Münich, (south) Germany at the same time. Registration is still open at a reduced rate and it is yet not too late to […]