Pitman medal for Kerrie Mengersen

My friend and co-author of many years, Kerrie Mengersen, just received the 2016 Pitman Medal, which is the prize of the Statistical Society of Australia. Congratulations to Kerrie for a well-deserved reward of her massive contributions to Australian, Bayesian, computational, modelling statistics, and to data science as a whole. (In case you wonder about the picture above, she has not yet lost the medal, but is instead looking for jaguars in the Amazon.)

This medal is named after EJG Pitman, Australian probabilist and statistician, whose name is attached to an estimator, a lemma, a measure of efficiency, a test, and a measure of comparison between estimators. His estimator is the best equivariant (or invariant) estimator, which can be expressed as a Bayes estimator under the relevant right Haar measure, despite having no Bayesian motivation to start with. His lemma is the Pitman-Koopman-Darmois lemma, which states that outside exponential families, sufficient is essentially useless (except for exotic distributions like the Uniform distributions). Darmois published the result first in 1935, but in French in the Comptes Rendus de l’Académie des Sciences. And the measure of comparison is Pitman nearness or closeness, on which I wrote a paper with my friends Gene Hwang and Bill Strawderman, paper that we thought was the final paper on the measure as it was pointing out several majors deficiencies with this concept. But the literature continued to grow after that..!

une vie brève [book review]

This short book is about the equally short life (une vie brève) of the young mathematician Maurice Audin, killed or executed by French special forces (Massu’s paratroopers) in Algiers during the Algerian liberation war. Maurice Audin was 25 when he died and the circumstances of his death remain unknown, since the French army never acknowledged this death and never returned his body to his family, but he presumably died under torture. He was a member of the Algerian communist party which had then been outlawed by the French authorities for supporting Algerian independence. Maurice Audin was arrested on June 11, 1957 for hiding a fugitive and he died in the following days… The book is written by his daughter, Michèle Audin, also a mathematician, and a writer of several novels around mathematics and mathematicians. It does not dwell on the death since so little is known but rather reconstructs the life of Maurice Audin from bits and pieces, family memories, school archives, a few pictures, some grocery bills of the Audin family… The style of Michèle Audin is quite peculiar, almost like written thoughts or half-thoughts at times, with a sort of surgical distanciation that makes the book both strong and touching. Maurice Audin wrote several papers in les Comptes Rendus de l’Académie des Sciences [the French PNAS] but did not live long enough to defend his thesis, which was presented by Laurent Schwartz the following year and defended in absentia… The French State never acknowledged its responsability in Audin’s death. (Another book on this death is L’Affaire Audin by the historian Pierre-Vidal Naquet, which appeared in 1958.)