Bergsma, Wicher

Dr Wicher Bergsma  


Position held

Associate Professor


Experience keywords:

categorical data analysis; likelihood-based inference; measures of association; nonparametric regression

Research summary > [Click to expand]

Dr Wicher Bergsma's expertise is in statistics in general with an emphasis on social statistics. His current research interests are in categorical data analysis, measurement of association, nonparametric regression, and maximum likelihood estimation.


Dutch [Spoken: Fluent, Written: Fluent]; French [Spoken: Intermediate, Written: Intermediate]; German [Spoken: Intermediate, Written: Intermediate]

Contact Points

LSE phone number:

+44 (0)20 7955 6725



Sankar, Subhra and Bergsma, Wicher and Dassios, Angelos (2017) Testing independence of covariates and errors in nonparametric regression Scandinavian Journal of Statistics. ISSN 0303-6898

Gao, Wei and Bergsma, Wicher and Yao, Qiwei (2017) Estimation for dynamic and static panel probit models with large individual effects Journal of Time Series Analysis, 38 (2). 266-284. ISSN 0143-9782


Dhar, Subhra Sankar and Dassios, Angelos and Bergsma, Wicher (2016) A study of the power and robustness of a new test for independence against contiguous alternatives Electronic Journal of Statistics, 10 (1). 330-351. ISSN 1935-7524


Bergsma, Wicher and van der Ark, Andries (2015) Categorical marginal models: quite extensive package for the estimation of marginal models for categorical data Comprehensive R Archive Network.


Bergsma, Wicher and Dassios, Angelos (2014) A consistent test of independence based on a sign covariance related to Kendall's tau Bernoulli, 20 (2). 1006-1028. ISSN 1350-7265


Sejdinovic, Dino and Gretton, Arthur and Bergsma, Wicher (2013) A kernel test for three-variable interactions. In: NIPS 2013, 05-08 Dec 2013, Lake Tahoe, USA

Bergsma, Wicher (2013) A bias-correction for Cramér’s and Tschuprow’s Journal of the Korean Statistical Society, 42 (3). 323-328. ISSN 1226-3192

Bergsma, W. P. and Aris, E. M. D. and Tibaldi, F. S. (2013) Linear Categorical Marginal Modeling of solicited symptoms in vaccine clinical trials Statistics in Biopharmaceutical Research, 5 (1). 27-37. ISSN 1946-6315

Bergsma, Wicher P. and Croon, M. A. and Hagenaars, J. A. (2013) Advancements in marginal modeling for categorical data Sociological Methodology, 43 (1). 1-41. ISSN 0081-1750


Bergsma, Wicher and Croon, Marcel and van der Ark, L. Andries (2012) The empty set and zero likelihood problems in maximum empirical likelihood estimation Electronic Journal of Statistics, 6. 2356-2361. ISSN 1935-7524


Ligtvoet, Rudy and Ark, L. Andries and Bergsma, Wicher P. and Sijtsma, Klaas (2011) Polytomous latent scales for the investigation of the ordering of items Psychometrika, 76 (2). 200-216. ISSN 0033-3123


Ark, L. Andries and Bergsma, Wicher P. (2010) A note on stochastic ordering of the latent trait using the sum of polytomous item scores Psychometrika, 75 (2). 272-279. ISSN 0033-3123

Rudas, Tamas and Bergsma, Wicher and Nemeth, Renáta (2010) Marginal log-linear parameterization of conditional independence models Biometrika, 97 (4). 1006-1012. ISSN 0006-3444


Bergsma, Wicher P and Croon, Marcel and Hagenaars, Jacques A. (2009) Marginal models for dependent, clustered, and longitudinal categorical data Statistics for social and behavioral sciences. Springer, New York, USA. ISBN 9780387096094

Lupparelli, Monia and Marchetti, Giovanni M. and Bergsma, Wicher (2009) Parameterizations and fitting of bi-directed graph models to categorical data Scandinavian Journal of Statistics, 36 (3). 559-576. ISSN 0303-6898


Rudas, Tamas and Bergsma, Wicher (2005) On applications of marginal models for categorical data Metron, LXII. 1-25. ISSN 0026-1424

Bergsma, Wicher P and Rapcsak, Tamás (2005) An exact penalty method for smooth equality constrained optimization with application to maximum likelihood estimation EURANDOM, Eindhoven, Netherlands.

Bergsma, Wicher and Croon, Marcel (2005) Analyzing categorical data by marginal models In: van der Ark, L.A, (ed.) New Developments in Categorical Data Analysis for the Social and Behavioral Sciences. Quantitative methodology series. Psychology Press, New Jersey, USA, 83-101. ISBN 9780805847284


Rudas, Tamas and Bergsma, Wicher (2004) Reconsidering the odds ratio as a measure of 2 x 2 association in a population Statistics in Medicine, 22. 3445-3447. ISSN 0277-6715

Galindo-Garre, Francisca and Vermunt, Jeroen K. and Bergsma, Wicher P. (2004) Bayesian posterior estimation of logit parameters with small samples Sociological Methods and Research, 33 (1). 88-117. ISSN 0049-1241


Bergsma, Wicher P. and Rudas, Tamas (2002) Marginal models for categorical data Annals of Statistics, 30 (1). 140-159. ISSN 0090-5364

Bergsma, Wicher and Rudas, Tamas (2002) Variation independent parameterizations of multivariate categorical distributions In: Cuadras, Carles and Fortiana, Josep and Rodriguez-Lallena, Jose, (eds.) Distributions With Given Marginals and Statistical Modelling. Kluwer Academic Publishers, Dordrecht, Netherlands, 21-28. ISBN 140200943

Bergsma, Wicher and Rudas, Tamas (2002) Modelling conditional and marginal association in contingency tables Annales de la Faculté des Sciences de Toulouse, 11 (4). 455-468. ISSN 0240-2963


Croon, Marcel and Bergsma, Wicher and Hagenaars, Jacques (2000) Analyzing change in categorical variables by generalized log-linear models Sociological Methods and Research, 29 (2). 195-229. ISSN 0049-1241


Bergsma, Wicher P. (1997) Marginal models for categorical data Tilburg University Press, Tilburg, Netherlands. ISBN 9036198373

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