Our research encompasses diverse projects and collaborations at the University of Washington and beyond. Find below information about the PI and about students at the University of Washington that are part of our team.

Principal Investigator

Johannes Lederer

Johannes is Professor of Mathematical Statistics at the Ruhr-University Bochum. His educational training spans physics, mathematics, and statistics. After receiving a MSc in Physics, he started his Doctor of Sciences under the supervision of Sara van de Geer and Peter Bühlmann at ETH Zürich in December 2009 and completed the degree in December 2012. After that, he was a postdoctoral researcher hosted by Martin Wainwright at UC Berkeley, until he accepted the position as the Jacob Wolfowitz Visiting Assistant Professor in the Department of Statistical Science at Cornell University in August 2013. In September 2015, he joined the University of Washington as Tenure-Track Assistant Professor of Statistics and Adjunct Assistant Professor of Biostatistics at the University of Washington. In December 2017, Johannes was appointed in Bochum.

Johannes is currently also Visiting Professor at UC Louvain, Affiliate Faculty at the University of Washington, and Associate Editor of the Encyclopedia of Mathematics.


Yunqi Bu photo

Yunqi Bu

Yunqi is a third year PhD student in Biostatistics at UW. She received her Bachelor’s degree in Mathematics from Nankai University, China, in 2013. Currently, she is working with Johannes on graphical models for high-dimensional data. In particular, she is developing models and methods to study brain connectivity. Visit her webpage for more information:

David Gold photo

David Gold

David is a second-year Ph.D. student in the Department of Statistics. His research interests include high-dimensional statistics, semi-/non-parameteric inference, statistical computation, and the interplay of statistics and differential geometry. David works with Johannes and Professor Jing Tao to develop estimators for high-dimensional instrumental variables models. He received his B.A. in philosophy and mathematics from Williams College in 2012.

Lun Li photo

Lun Li

Lun has recently earned his Bachelor’s degree in Statistics and Economics from University of Washington, and is now pursuing a Master’s degree in Statistics at UW. Lun is currently working with Johannes on the development and application of statistical methodology for microbial networks.

Wei Li photo

Wei Li

Wei is a third year PhD student in statistics at Peking University, China. Currently, he is a visiting student at the Biostatistics Department at the University of Washington. He received his Bachelor degree from Nankai University, China. His research is focused on causal inference, missing data, and high-dimensional statistics. Wei is working with Johannes on tuning parameter selection for penalized logistic regression.

Peiran Liu photo

Peiran Liu

Peiran is a STAT PhD student at UW. This will be his second year of his PhD life, and fourth year at UW in Seattle. He has been working as a data scientist intern at CDK Global. In school, he is working with Professor Adrian Raftery in Demographic Statistics and with Johannes in high dimension statistics. Peiran is interested in all kinds of machine learning techniques, both from a theoretical and practical point of view. If anyone wants to discuss with him about something of the above, do not hesitate to contact him. Peiran has also many interests outside work. He likes all kinds of card games, especially bridge, and he plays mahjong and Hearthstone. Additionally, he plays badminton and table tennis. He is looking forward to playing those games with you guys together.

Lu Yu photo

Lu Yu

Lu is a first year Master’s student in Statistics at the University of Washington. She received her Bachelor degree in Mathematics and Applied Mathematics at the Shandong University, China. Currently, Lu and Johannes work on Oracle Inequalities for high-dimensional prediction.

Rui Zhuang photo

Rui Zhuang

Rui is a second year PhD student of Biostatistics at the University of Washington. Before joining the University of Washington, Rui received her Bachelor degree from Nanjing University, China and was a research assistant of genetics at Hong Kong University of Science and Technology. Currently, Rui is working with Johannes on high dimensional statistical inference. They are particularly interested in networks. For more information, please visit her website: .


Donghui Mai photo

Donghui Mai

Donghui is a senior in Statistics and Applied & Computational Math Sciences at the University of Washington. She is now working on a toolbox for reproducible research in high-dimensional statistics. In particular, she is developing algorithms for efficient and realistic data generation in regression and network settings.