no code implementations • 30 Mar 2023 • Mia Garrard, Hanson Wang, Ben Letham, Shaun Singh, Abbas Kazerouni, Sarah Tan, Zehui Wang, Yin Huang, Yichun Hu, Chad Zhou, Norm Zhou, Eytan Bakshy
Many organizations measure treatment effects via an experimentation platform to evaluate the casual effect of product variations prior to full-scale deployment.
no code implementations • 31 Jan 2021 • Yichun Hu, Nathan Kallus, Masatoshi Uehara
Second, we provide new analyses of FQI and Bellman residual minimization to establish the correct pointwise convergence guarantees.
no code implementations • 5 Nov 2020 • Yichun Hu, Nathan Kallus, Xiaojie Mao
While one may use off-the-shelf machine learning methods to separately learn a predictive model and plug it in, a variety of recent methods instead integrate estimation and optimization by fitting the model to directly optimize downstream decision performance.
1 code implementation • 6 May 2020 • Yichun Hu, Nathan Kallus
While existing literature mostly focuses on estimating the optimal DTR from offline data such as from sequentially randomized trials, we study the problem of developing the optimal DTR in an online manner, where the interaction with each individual affect both our cumulative reward and our data collection for future learning.
1 code implementation • 5 Sep 2019 • Yichun Hu, Nathan Kallus, Xiaojie Mao
We study a nonparametric contextual bandit problem where the expected reward functions belong to a H\"older class with smoothness parameter $\beta$.