Sept 2020, After having been a Professor of Statistics at Ecole Polytechnique and a visiting researcher at Google Brain IA Paris, I have a new position of Advanced Researcher at Inria. I  am a scientific collaborator associated to CMAP Polytechnique and teaching at Ecole Polytechnique, in particular causal inference.
News: Workshop 22-23 June 2021. Leveraging observational data with ML.

– Talk: Supervised learning with missing values (pres of linear models, random forest, neural networks) slides, videos
– Talk: Causal inference with missing values slides, videos
– Talk: A  missing values tour  slides, video available (start at 30′)
Interns/Phd/Postdoc positions on causal inference and policy learning for personalized medicine. Contact me. Internship to predict the need of intubation available.

Project TrauMatrix decision tool for intensive Care; short VideoPodcast 
– ICUBAM ICU Bed Availability Monitoring  in the Grand Est région during the COVID-19 epidemic. Fork.
–  
R-mis-static website, with missing values ressources (lecture, workflows, tutorials, etc.), Contribute!
Rforwards dedicated to widen the participation of the minorities in communities.

julie.josse[at]inria.fr   – Office, 226,  INRIA Montpellier. Member of IDESP.

My main research fields are: missing values (EM algorithms, imputation, supervised learning), causal inference (treatment effect estimation, combining RCT and observational data; survival analysis),  visualization with dimensionality reduction (PCA, correspondence analysis), questionnaire analyses, multi­-blocks data; low rank matrix estimation; main application in  health for personalised medicine.  Detailed CV

Research

Projects and collaboration:
Causal inference:
– Causal inference with missing values  (with Stefan Wager) 
– Transporting causal effect, combining RCT and observational data (with Shu Wang),
– Survival causal inference, sensitivity analyses, policy learning
Missing values:
– Missing Non At Random data (with Claire Boyer)
– Supervised Learning with missing values: Random Forests, Neural Nets (with Erwan Scornet, Gael Varoquaux)
– Variable selection to control the FDR with missing values (with Gosia Bogdan)
– PCA with missing values, multiple imputation, package missMDA (with François Husson)
Health applications:
Handling severe trauma patients, with the Traumabase group, J.P Nadal and Capgemini
– Covid19: Application for bed allocation monitoring/Predict need of intubation/ Effect of hydrochloroquine
Others:
– New collaborations: with Jes Frellsen with a grant and J.P Vert at Google.
Distributed computation with hospital data (with Balasubramanian Narasimhan)
– Exploratory data analysis (What was the French school of data analysis?)

Students & group’s meeting: the missing data and causal inference group at Inria

Associate Editor: JMLR. Past:  Journal of Computational & Graphical Statistics.  Journal of Statistical Software. (7 years). AC for Neurips2020, ICLR2021.

An overview of my research up to 2016 can be found in my Habilitation.  (slides)

Publications:
YearAuthors Title link
2021Colnet, B, Varoquaux, G., Scornet, E. & Josse, J.Generalizing a causal effect: sensitivity analysis and missing covariates. pdf
2021Mayer, I., Josse, J & TraumbaseTransporting treatment effects with incomplete attributes. Submittedpdf
2020Colnet, B et al.Causal inference methods for combining randomized trials and observational studies: a review. Submittedpdf
2020Le Morvan, J. Josse, M., Moreaux, T, E. Scornet. & G. VaroquauxNeumiss networks: differential programming for supervised learning with missing values. Neurips2020. (Oral) pdf
2020Sbidian et al. Hydroxychloroquine with or without azithromycin and in-hospital mortality or discharge in patients hospitalized for COVID-19 infection: a cohort study of 4,642 in-patients in Francepdf
2020Consortium ICUBAMICU Bed Availability Monitoring and analysis in the Grand Est région of France during the COVID-19 epidemic. pdf
2020A. Sportisse, C. Boyer,
and Josse, J.
Estimation and imputation in Probabilistic Principal Component Analysis with Missing Not At Random data.
Neurips2020.
pdf
slides
video
code
2020A. Sportisse, C. Boyer, A. Dieuleveut, J. Josse.Debiasing Stochastic Gradient Descent to handle missing values. Neurips2020. pdf
slides
2020J.D. Moyer et al. Trauma reloaded: Trauma registry in the era of data science. Anaesthesia Critical Care & Pain Medicine pdf
2020Muzellec, B., Josse, J. Boyer, C. & Cuturi, M.
Missing Data Imputation using Optimal Transport. ICML2020. pdf
slides
videos
code
2019Josse, J., Mayer, I, & Vert, J.P.MissDeepCausal: causal inference from incomplete data using deep latent variable modelspdf
2020Le Morvan, M., N. Prost, J. Josse, E. Scornet. & G. VaroquauxLinear predictor on linearly-generated data with missing values: non consistency and solutions. AISTAT2020. pdf
slides
2020Descloux, P. , Boyer, C. Josse, J. Sportisse, A. Sardy, S. Robust Lasso-Zero for sparse corruption and model selection with missing covariates. Submitted
pdf
2019Mayer, I, Josse, J., Vialaneix, N., Tierney, N. R-miss-tastic: a unified platform for missing values methods and workflows.
pdf
2019-20Mayer, I, Josse, J., Wager, S., Sverdr, E., Moyer, J.D. and Gauss, T. Doubly robust treatment effect estimation with incomplete confounders.
Annals Of Applied Statistics (AOAS)
pdf
code
slides
videos
2019-21M. Bogdan, W. Jiang, J. Josse, B. Miasojedow and V. Rockova.Adaptive Bayesian SLOPE – High dimensional Model Selection with Missing Values.
JCGS.
pdf
slides
2019Josse, J., Prost, N., Scornet, E. & Varoquaux, G. On the consistency of supervised learning with missing values.
In revision in JMLR.
pdf
code
2019G. Robin, O. Klopp, J. Josse, E. Moulines, and R. Tibshirani Main effects and interactions in mixed and incomplete data frames.
Journal of the American Statistical Association.
pdf
Package
2019Hamada, S et al.Effect of Fibrinogen administration on early mortality in traumatic haemorrhagic shock: a propensity score analysis.
Journal of Trauma
2019Sportisse, A., Boyer, C. and Josse, J.Low-rank estimation with missing non at random data.
Statistics and Computing
pdf
code
2018Josse, J., Husson, F. Robin, G. and Balasubramanian. N.Imputation of mixed data with multilevel SVD.
Journal of Computational and Graphical Statistics.
pdf
2018Robin, G, Sardy, S., Moulines, E. and Josse, J. Low-rank model with covariates for count data
with missing values.
Journal of Multivariate Analysis.
pdf
Package
code

2018Jiang, W., Lavielle, M. Josse, J. and T. Gauss.Logistic Regression with Missing Covariates -- Parameter Estimation, Model Selection and Prediction within a Joint-Modeling Framework.
CSDA
pdf
Package, code
2018 G. Robin, Hoi To Wai, J. Josse, O. Klopp and E. MoulinesLow-rank interactions and sparse additive effects model for large data frames.
NeurIPS 2018.
2018Josse, J. and Reiter, J.Introduction to the Special Section on Missing
Data.
Statistical Sciences
pdf
2018Seijo-Pardo, B., Alonso-Betanzos, A., P. Bennett, K. Bol\'on-Canedo, Josse, J., Saeed, M., Guyon, I. Feature selection in the presence of missing data.
Neurocomputing, ESANN.
2017-2018Mozharovskyi, P., Husson, F. and Josse, J.Nonparametric imputation by data depth.
Journal of the American Statistical Association.
pdf
code
2017Holmes, S and Josse, J.50 years of data-sciences, discussion.
Journal of Computational and Graphical Statistics.
pdf
2017Bollmann, S., Cook, Di. Dumas, J., Fox, J., Josse, J., Keyes, O. Strobl, C., Turner, H. and Debelak, R.A First Survey on the Diversity of the R Community.
R journal.
2017G. Celeux, J. Jewson, J. Josse, J.M. Marin and C. P. Robert.Some discussions on the Read Paper "Beyond subjective and objective in statistics" by A. Gelman and C. Hennig.

pdf
2017Foulley, JL, Celeux, G and Josse, J.Empirical Bayes approaches to PageRank type
algorithms for rating scientific journals.
Technical report.
pdf
2016Sobczyk, P, Bogdan, M. and Josse, J.PCA using penalized semi-integrated likelihood.
Journal of Computational and Graphical Statistics JCGS.
pdf
2016Fithian, W. and Josse, J.Multiple Correspondence Analysis & the Multilogit Bilinear Model.
Journal of Multivariate Analysis.
pdf
2016Husson, F., Josse, J. and Saporta, G.Jan de Leeuw and the French school of data analysis.
Journal of Statistical Software.
pdf
2016-2017Josse, J., Sardy, S. and Wager, S.denoiseR: a package for low rank matrix estimation.
Journal of Statistical Software.
pdf
Package
2016Groenen, P. and Josse, J.
Multinomial Multiple Correspondence Analysis. pdf
2016Fujii, H., Josse, J., Tanioka, M., Miyachi, Y. Husson, F., and Ono, M.Regulatory T cells in melanoma revisited by a computational clustering of FOXP3+ T cell subpopulations.
Journal of Immunology.
pdf
2015Audigier, V., Husson, F. and Josse, J.MIMCA: Multiple imputation for categorical variables with multiple correspondence analysis.
Statistics and Computing.
pdf
2015-2016Josse, J and Wager, S. Bootstrap-Based Regularization for Low-Rank Matrix Estimation.
Journal of Machine Learning research.
pdf
2015Josse, J. and Sardy, S.Adaptive Shrinkage of singular values.
Statistics and Computing.
pdf
2015Josse, J and Husson, F.
missMDA a package to handle missing values in and with multivariate data analysis methods.
Journal of Statistical Software.
pdf
2015 Audigier, V., Husson, F. and Josse, J.Multiple Imputation with Bayesian PCA. 
Journal of Statistical Computation and Simulation.
pdf
2015-2016Josse, J. and Holmes, S.Measuring multivariate association.
Statistics Survey.
pdf
2014Audigier, V., Husson, F. and Josse, J.A principal components method to impute mixed data. 
Advances in Data analysis and Classification. 
pdf
2014Josse, J., Wager, S. and Husson, F.

Confidence areas for fixed-effects PCA. 
Journal of Computational and Graphical Statistics.
pdf
2014Dray, S and Josse, J.Principal component analysis with missing values: a comparative survey of methods.
Plant Ecology. 
pdf
2014Josse, J.,  van Eeuwijk, F., Piepho, H-P and Denis, J.B.Another look at Bayesian analysis of AMMI models for genotype-environment data. 
Journal of Agricultural, Biological, and Environmental Statistics.
pdf
2013Verbanck, M., Josse, J. and Husson, F.Regularized PCA to denoise and visualise data. 
Statistics and Computing.  
pdf
2013Josse, J., Timmerman, M.E. and Kiers, H.A.L.
Missing values in multi-level simultaneous component analysis.
Chemometrics and Intelligent Laboratory Systems.
pdf
2013Husson, F. and Josse, J.Handling missing values in Multiple Factor Analysis.
Food Quality and Preferences.
pdf
2013Josse, J and Husson, F.Handling missing values in exploratory multivariate data analysis methods.
Journal de la SFdS. Paper written for the best Ph.D doctoral thesis prize delivered by the French Statistical Society.
pdf
2012Josse, J., Chavent, M., Liquet, B. and Husson, F.
Regularized Iterative Multiple Correspondence Analysis.
Journal of Classification.
pdf
2011Josse, J and Husson, F.Selecting the number of components in PCA using cross-validation approximations.
Computational Statistics and Data Analysis.
pdf
2011Josse, J., Husson, F. and Pagès, J.Multiple imputation in PCA.
Advances in data analysis and classification.
pdf
2010Josse, J., Husson, F. and Pagès, J.Principal component methods - hierarchical clustering - partitional clustering: why would we need to choose for visualizing data?
Technical report.
pdf
2009Josse, J., Husson, F. and Pagès, J.Analyse en Composantes Principales.
Journal de la SFdS.
pdf
2008Josse, J., Husson, F. and Pagès, J.Testing the significance of the RV coefficient.
Computational Statistics and Data Analysis.
pdf
2008Lê S., Josse, J. and Husson, F.FactoMineR: an R package for multivariate analysis.
Journal of Statistical Software.
pdf

Talks

Some talks:

YearTitle EventSlides/Video
2021Supervised learning with missing values (pres of neural networks with missing values) IAS Special Year on Optimization, Statistics & Theoretical Machine Learning slides
video
2021Introduction to causal inferenceSeminar Montpellier ML, Gustave Roussy, Google Brainslides
2019 Doubly-robust treatment effect estimation with incomplete confoundersSeminar Frejus I. Mayer.slides
2019Decisions trees with missing values, selection and predictionSFDS N Prost. slides
2019On the consistency of supervised learning with missing valuesCornell, Statlearn, Google Brainslides
2019 High dimensional variable selection with missing values with adaptive slopeDagStat, Munichslides
2019Low-rank estimation and imputation with MNAR data DagStat, Munichslides
2019Causal inference with missing valuesLyonslides
2018Distributed multilevel matrix completion for medical dataFrance-Finland Worshop, Washington University Seminarslides
2018
Stochastic Approximation EM for logistic regression with missing valuesCMStat, London, 17 Decemberslides
2017Single Imputation with data depthCMStat, London, 17 Decemberslides
2017 R forwards to widen the participation of under-represented groupsuseR!2017, 7 Julyvideo
slides
2017Empirical Bayes approaches to PageRank type algorithms for rating scienti fic journals French Stat Society, 29 Mayslides
2017Low-rank log-linear models. Vienna, University of economics and business, 16 March
Telecom, Paris, 23 March.
slides
2016 Meetup Machine Learning, Paris, France, 10 February
2016 Imputation with data depth - Pavlo Mozharovskyi French Stat Society, Montpellier, France, May slide
2016MultiLogit bilinear model & MCA Working group on model based clustering, Paris, France, 22 July
AgroPariTech, Paris, France, 13 June
2015Missing values and principal components methods INRIA, Orsay, France, 12 October
Tesla Motor, Palo Alto, USA, 14 August
2015Multiple imputation for categorical data Conference CARME (correspondence analysis & related methods), Napoli, Italy, 21 September
Journée de Statistiques, Rennes, France, 23 october
20152015 A flexible framework for regularized low rank matrix estimationLos Alamos, USA, 15 February
Rotterdam University , Netherlands, 30 January
Adobe Research , San Jose, USA, 20 January
2015 Visualization with regularized PCA Stanford Biostatistics, Palo Alto, USA, 15 January
MultiLogit bilinear model & MCAslides
Bootstrap approach for low rank estimationslides
A missing values tour with principal componentsslides
Visualization with regularized PCA and confidence ellipses

slides
Exploratory data analysis: multi­-blocks/3ways methodsslides
Multiple imputation for categorical dataslides
Imputation of mixed data: Random forest/PCAslides
2014A flexible framework for regularized low rank matrix estimation Montpellier 2 University, France, 20 October
Paris Descartes University, France, 24 October
Wroclaw University, Poland, 31 October

Software – R

I am involved in the R software community and I am sincerely glad to have been elected as a member of the R Foundation for Statistical Computing. Please if R is helping you, help us by supporting with donation

Development of packages:
FactoMineR: visualization with principal components methods
missMDA: missing values (imputation continuous, categorical data) – matrix completion
For questions on the use of packages we have a google group.
denoiseR: low rank matrix estimation with regularized SVD and bootstrap

My students have also developed R packages associated to our  works:
misaem: logistic regression with missing values
mimi: Generalized low-rank models for mixed and incomplete data frames.
lori: contingency table with missing values and covariates

Development of R-miss-tastic:
Project funded by the R consortium (Infrastructure Steering Committee) to federate the community. Aim: a reference platform on the theme of missing data management (list existing packages, available literature, tutorials, analysis workflows on data,  main actors, etc)

If you want to do causal inference with missing values, you can use the R package grf where a double robust method handling missing covariates is implemented and see the pipeline to compare different estimators (IPW, DR) strategies (imputations, etc.).

Development of ICUBAM (ICU Bed Allocation Monitor) as an open source project with Inria, to visualize the availability of resuscitation beds. This started as a personal initiative from a rescusitator in the Grand-Est region who identify the need to to visualize available Covid + beds in real time (with a respirator). ICUBAM is an operational tool for rescuscitators in times of crisis to model patient flows, anticipate bed needs and welcome patients from submerged areas. ICUBAM has been deployed in 130 ICU wards in 40 départements, and inventories more than 2,000 ICU. Slides application, Slides models, paper, github.

I  served as an associate editor of Journal of Statistical Software (2011-2017) and I am involved in Rforwards to leading the R community forwards in widening the participation of women and other under-represented group. I am in the R foundation conference committee and work for implementation of Code of Conduct.
With M. Chavent, S. Dray, R. Genuer, F.Husson, B. Liquet, J. Sarracco, we created the « French R board group » to support the organization of Les Rencontres R.

News: Video presentation of Rforwards. Blog posts and multivariate studies of the R community.
Support R with the R consortium.

Teaching

As a French professor, I was teaching around 160 hours/year (lectures, computer labs mainly with the R software) and I supervise master students projects and their internship in industry.  I was the head of a master of Data-Science for Business at Ecole Polytechnique. In addition, I give tutorials in different instituts and in conferences. Learn more. From, Sept 2020, I  teach Causal Inference in the IPP (Institut Polytechnique de Paris.) Master of Data Science at Polytechnique. For recent tutorials on missing values see the Rmistatic plateform.

 

Bio

Her first employment was in the statistics department of an Agronomy University (Agrocampus Ouest) where she was trained to « the French data analysis school » and had the opportunity to work closely with researchers from other departments and increases her interest in transversal studies. In the meantime, she prepared her PhD which was defended in 2010 and rewarded by the French Statistical Society as the best PhD in applied statistics. She has specialized in missing data, visualization and the nonparametric analyses of complex data structures. Her work was rewarded by a Marie Curie European Union grant in 2013 to increase her research potential and to spend a year at Stanford University. She spent a year as a researcher in INRIA before joining Polytechnique in 2016 as a Professor of Statistics. At Polytechnique, she was responsible of a master in data-sciences for business in collaboration with HEC. She has been a visiting researcher at Google Brain Paris, for a year (2 days a week) in 2019. In september 2020, she join Inria as an advanced researcher to set-up a team in data-science for health. She has published over 50 articles and written 2 books in applied statistics.  Her experience on dealing with incomplete data is recognized by the community: she organized an ICML workshop, the MissData conference, created the Rmistatic website and she is often invited to give lectures to share her experience. Her vocation is to push methodological innovation to bring useful application of her research to the user in particular in bio-sciences and health. Her current research focuses on causal inferences techniques for personalized medicine. She leads a project with the Traumabase group dedicated to the management of polytraumatized patients to help emergency doctors making decisions. Julie Josse is dedicated to reproducible research with the R statistical software: she has developed packages including FactoMineR, denoiseR, missMDA to transfer her work, she is a member of the R foundation and of Rforwards to increase the participation of minorities in the community.

Perso: I grew up in Africa and French Polynesia. Then I arrived in Brittany a magnificent French region and I had the chance to discover Paris and now the south of France.  I am passionate about statistics but also about travelling (often on horseback) around the world. I am also fascinated by nature and science (fan of https://www.sciencefriday.com/, wildlife photographer of the year). I have a particular interest in humanitarian issues and my long-term goal is to use more of my skills for these purposes.

Interview in medium.

Misc

Links:
– SFdS French Statistical Society – Interested in data sciences? Join-us!!
– Some historical references on french data analysis, data sciences.
Roger Peng’s activities and  Brian Caffo youtube channel.  

Conferences organization head:
Artemiss workshop at ICML 2020.
– The first MissData on missing values and matrix completion, June 2015.
– Correspondence analysis related methods CARME 2011. Videos. Let the data speak…. data analysis
– The R conference useR! 2009