Archive for WinBUGS

Bayesian modeling using WinBUGS

Posted in Books, R, Statistics, University life with tags , , , , , , , , , , , on November 7, 2011 by xi'an

Yes, yet another Bayesian textbook: Ioannis Ntzoufras’ Bayesian modeling using WinBUGS was published in 2009 and it got an honourable mention at the 2009 PROSE Award. (Nice acronym for a book award! All the mathematics books awarded that year were actually statistics books.) Bayesian modeling using WinBUGS is rather similar to the more recent Bayesian ideas and data analysis that I reviewed last week and hence I am afraid the review will draw a comparison between both books. (Which is a bit unfair to Bayesian modeling using WinBUGS since I reviewed Bayesian ideas and data analysis  on its own! However, I will presumably write my CHANCE column as a joint review.)

“As history has proved, the main reason why Bayesian theory was unable to establish a foothold as a well accepted quantitative approach for data analysis was the intractability involved in the calculation of the posterior distribution.” Chap. 1, p.1

The book launches into a very quick introduction to Bayesian analysis, since, by page 15, we are “done” with linear regression and conjugate priors. This is somehow softened by the inclusion at the end of the chapter of a few examples, including one on the Greek football  team in Euro 2004, but nothing comparable with Christensen et al.’s initial chapter of motivating examples. Chapter 2 on MCMC methods follows the same pattern:  a quick and dense introduction in about ten pages, followed by 40 pages of illuminating examples, worked out in full detail. CODA is described in an Appendix. Compared with Bayesian ideas and data analysis, Bayesian modeling using WinBUGS spends time introducing WinBUGS and Chapter 3 acts like a 20 page user manual, while Chapter 4 corresponds to the WinBUGS example manual. Chapter 5 gets back to a more statistical aspect, the processing of regression models (including Zellner’s g-prior). up to ANOVA. Chapter 6 extends the previous chapter to categorical variables and the ANCOVA model, as well as the 2006-2007 English premier league. Chapter 7 moves to the standard generalised linear models, with an extension in Chapter 8 to count data, zero inflated models, and survival data. Chapter 9 covers hierarchical models, with mixed models, longitudinal data, and the water polo World Cup 2000. Continue reading →

Summer school in Gran Paradiso

Posted in Mountains, R, Statistics, University life with tags , , , on June 20, 2011 by xi'an

The Parco Nazionale Gran Paradiso and the Università di Pavia are organising a summer school on “Advances in species distribution modelling in ecological studies and conservation” in Pavia and Cogne, 12-18 September 2011. This school includes R and Winbugs tutorials, regular classes, plus a field trip to the park, so this sounds quite exciting (at least if you are interested in statistical ecology or ecological statistics). Following my  great experience there two years ago, I wish I could get back to Aosta to attend (and try once again to climb La Grivola!) but this is the start of the semester… (The deadline for registration is July 31.)

Bayesian courses in København

Posted in R, Statistics, University life with tags , , , on January 27, 2010 by xi'an

I received this announcement about two incoming courses given in København by Andrew Lawson:

1) “*An Introduction to Bayesian Disease Mapping*”

A Two-Day Course, April 12.- 13. 2010, University of Southern Denmark
This course is designed to provide an introduction to the area of Bayesian disease mapping in applications to Public Health and Epidemiology:

2) “*Advanced Bayesian Disease Mapping*”

A Two-Day Course, April 15. – 16. 2010, University of Southern Denmark, Copenhagen, Denmark
This course is designed to provide advanced coverage of Bayesian disease mapping topics in applications to Public Health and Epidemiology: It is intended as an extension to the course: *An Introduction to Bayesian Disease Mapping*. Emphasis on the course is placed on spatial and spatio-temporal Bayesian modeling issues, and some knowledge of Bayesian computation and WinBUGS is assumed.