Ryan Joseph Tibshirani (born December 15, 1985) is a professor and chair of the Department of Statistics at the University of California, Berkeley.[1] His work spans high-dimensional statistics, nonparametric estimation, distribution-free inference, convex optimization, and epidemic tracking and forecasting.[2][3][4]
Tibshirani was born on December 15, 1985 in Toronto, Canada. He earned a B.S. in Mathematics from Stanford University in 2007 and a Ph.D. in Statistics from Stanford in 2011; his dissertation, The Solution Path of the Generalized Lasso, was advised by Jonathan Taylor.[5][6]
Career
From 2011 to 2022, Tibshirani was a faculty member in the Department of Statistics and Department of Machine Learning at Carnegie Mellon University (CMU).[7] He joined UC Berkeley in 2022 and became department chair effective July 1, 2025.[1]
In 2024, he became founding co-Editor-in-Chief of Foundations and Trends in Statistics with Rina Foygel Barber.[13]
Research
Tibshirani’s research focuses on methodology and theory for high-dimensional and nonparametric problems, often connecting statistical inference with convex optimization.[2][3] He has made important contributions to regularization and sparsity methods, including the lasso, generalized lasso, and trend filtering, developing both theoretical guarantees and efficient algorithms.[14][15] He has also contributed to selective inference, to distribution-free predictive inference (conformal prediction) and to epidemic modeling and forecasting.[2]
AAPOR Policy Impact Award and Warren J. Mitofsky Innovators Award (both 2022), as part of the COVID-19 Trends and Impact Survey (Delphi Group/UMD/Meta) team.[22][23]
ASA Statistical Partnerships Among Academe, Industry, and Government (SPAIG) Award (2021), with the Delphi COVIDcast collaborators.[24][25]
Carnegie Mellon University Teaching Innovation Award (2017).[26]
Personal life
Ryan Tibshirani is the son of statistician Robert Tibshirani with brother Charlie Tibshirani and younger sister Julie Tibshirani, who is a co-creator of the R package Generalized Random Forest package.[27][28] He is married to Jessica Tibshirani (née Issler) and they have two children.[28]
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