I am professor of Mathematical statistics (Statistical science) at Stockholm University. I am formally retired from October 2009, but was re-employed part-time for many years, to give one or two courses per year. From 2020 onwards my involvement is much smaller. In recent years I have also been involved in some reasearch with other SU scientists.

My interests are in statistical modelling and statistical methods, both theory and applications.

Fields of active research or particular competence are:

• Inferential principles,
• Exponential families, theory and applications, (book published 2019)
• Climate models and paleoclimate statistics,  
• Latent factor analysis (e.g. article published 2016)
• Biostatistics, in particular for molecular biology
• Chemometrics (regression and multivariate calibration),
• Sampling survey inference (in particular model-based inference)
• Statistical methods in stereology,
• Use of experimental design
• Applied statistics in statistical consulting.  (annual course for many years)

Courses given

2004, autumn, I gave a course on Statistical theory for exponential families.

2005, spring teerm, I taught Linear statistical models and Statistical consulting methodology (this time in English). I also led a course on Statistics for microarrays.

2006, spring term, I taught Linear statistical models and Principles of statistical inference (graduate level; based on a book manuscript by David Cox).

In the period 2007 to 2012, I gave  two courses per year on Master/Ph.D. level:
Statistical models, based on my own lecture notes on parametric statistical inference and exponential families (2019 as textbook from Cambridge University Press), and 
Statistical Consulting, involving clients and projects from the departmental consulting service (see also below).

2015, spring, I was responsible for a study group of Ph.D. students on the topic of sampling theory.

Febr. 2019 I gave the main part of an intensive 3-days course on statistical inference theory for Ph.D students in statistics, with emphasis on exponential family models inference and more general frequentist parametric inference. 

2019 was the last of more than 20 successive years that I gave the statistical consulting course. In the first pandemic year, 2020, there was no course, and since 2021 Jan-Olov Persson has taken over the responsibility, and I have only given some guest lectures.

2012, 2013 and 2021 I gave part of the Linear statistical models course. 2021 I added a chapter on time series analysis to the course and its Lecture notes. Each year until then (some 40 years) I have also given one or two guest lectures for this course, discussing real data.

Some recent talks

Sept. 2015 I gave a talk at the Past Earth Network (PEN) Conference in Crewe, England, jointly with Anders Moberg (Bolin Centre): Statistical framework for evaluation of climate model simulations by use of climate proxy data.

Dec. 2015 I gave a talk for master students i Statistics, SU: Statistical and other models for palaeo-climate research.

June 2016 I gave a talk for students participating in the Research Academy for Young Scientists (RAYS) workshop, Strängnäs.

Dec. 2016 I gave most part of an intensive 3-days course on statistical inference theory for Ph.D students in statistics, with emphasis on exponential family models and on hypothesis testing. 

17 May 2017 I gave a talk at my dept: "Shaved dice" inference — Two contrasting points of view of a simple situation. 

23 Oct. 2017 I gave an invited talk: "Statistical inference when dimension (much) exceeds sample size", in a conference at KTH on high-dimensional data  and big data.

11 Jan. 2023 I gave a talk at my dept: Harald Cramér, Willy Feller, and the 'Institute' – between two world wars

Recent Ph.D. students under my supervision,

and their areas of research:

Marie Linder (Ph.D. dissertation 15 Jan 1999):
(Bilinear regression and second order calibration)

Anders Björkström (Licentiate exam 1998, PhD dissertation 28 Sept 2007):
(Generalized ridge regression and other regression methods for near-collinear data)

Niklas Norén (Licentiate exam 2005, PhD dissertation 7 May 2007):
(Searching in databases for information on side effects of medications; co-advisor Ralph Edwards)

Anna Stoltenberg (Licentiate exam 23 Sept. 2009):
(Statistical analysis of ordered categorical data in pharmaceutical trials; co-advisor Olivier Guilbaud, AstraZeneca)

Jelena Bojarova (Licentiate exam 2004, PhD dissertation 4 June 2010):
(Toward sequential data assimilation for NWP models using Kalman filter tools)

Ekaterina Fetisova (Licentiate exam 2015, PhD dissertation 12 Dec. 2017):
(Statistical modelling in palaeo-climatology; I was co-advisor)

Contact information

E-mail address: rolfs at math.su.se,  or rolfsundberg1942 at telia.com
Older webpage at http://staff.math.su.se/rolfs/ including CV and Publication list with links
I can also be found on Researchgate, but I am not active there.