Wenlong Mou (牟文龙)

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Assistant Professor,
Department of Statistical Sciences,
University of Toronto
Office: Ontario Power Building, Room 9190, Toronto, ON
E-mail: wmou.work [@] gmail [DOT] com
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About me

Welcome to my homepage! I am an Assistant Professor at the Department of Statistical Sciences, University of Toronto. I recently obtained my Ph.D. from the Department of EECS, UC Berkeley, where I was very fortunate to be advised by Prof. Martin Wainwright and Prof. Peter Bartlett. Prior to Berkeley, I received B.S. in Computer Science from Peking University in 2017, where I was very fortunate to work with Prof. Liwei Wang.


My research interests are broadly in statistics, machine learning theory, dynamic programming and optimization, and applied probability. In particular, I develop optimal statistical methods that enable optimal decision making, powered with efficient computational algorithms. Currently, I work on the following topics:

  • Theory of reinforcement learning with function approximation, geometry of Bellman equations, statistical complexity of reinforcement learning

  • Non-asymptotic theory of semi-parametric statistics, finite-sample optimal methods for treatment effect estimation

  • Stochastic approximation algorithms under statistical settings, interplay between geometry, stochastic processes and optimization

  • Discretization of diffusion processes, high-dimensional MCMC algorithms, Bayesian posterior contraction


I am actively seeking Ph.D. students. Please see the post for detailed information. If you are interested in collaborating with me, please don't hesitate to reach out. However, please be aware that I receive a high volume of emails daily, which may lead to some delays in my response. Your patience in this regard is greatly appreciated. Thank you.


  • Dec 2023: Paper on diffusion process methods for Bayesian posterior contraction accepted to SIAM Journal on Mathematics of Data Science

  • Nov 2023: New paper on general and near-optimal methods for regression adjustment in finite population framework.

  • Sep 2023: Paper on Markovian stochastic approximation accepted to Mathematical Statistics and Learning

  • Mar 2023: New paper on debiased IPW estimator in high dimensions.

  • Jan 2023: New paper on instance-dependent optimality for off-policy estimation beyond semi-parametric efficiency bound.