no code implementations • 21 Jul 2023 • Khashayar Khosravi, Renato Paes Leme, Chara Podimata, Apostolis Tsorvantzis
We present online learning algorithms for any possible value of the evolution rate $\lambda$ and we show the robustness of our results to various model misspecifications.
no code implementations • NeurIPS 2021 • Nick Doudchenko, Khashayar Khosravi, Jean Pouget-Abadie, Sebastien Lahaie, Miles Lubin, Vahab Mirrokni, Jann Spiess, Guido Imbens
We investigate the optimal design of experimental studies that have pre-treatment outcome data available.
no code implementations • 25 Feb 2021 • Quanquan Gu, Amin Karbasi, Khashayar Khosravi, Vahab Mirrokni, Dongruo Zhou
In many sequential decision-making problems, the individuals are split into several batches and the decision-maker is only allowed to change her policy at the end of batches.
1 code implementation • NeurIPS 2020 • Mohsen Bayati, Nima Hamidi, Ramesh Johari, Khashayar Khosravi
We study the structure of regret-minimizing policies in the {\em many-armed} Bayesian multi-armed bandit problem: in particular, with $k$ the number of arms and $T$ the time horizon, we consider the case where $k \geq \sqrt{T}$.
2 code implementations • 24 Feb 2020 • Mohsen Bayati, Nima Hamidi, Ramesh Johari, Khashayar Khosravi
This finding diverges from the notion of free exploration, which relates to covariate variation, as recently discussed in contextual bandit literature.
1 code implementation • 11 Jan 2019 • Khashayar Khosravi, Greg Lewis, Vasilis Syrgkanis
We show that if the intrinsic dimension of the covariate distribution is equal to $d$, then the finite sample estimation error of our estimator is of order $n^{-1/(d+2)}$ and our estimate is $n^{1/(d+2)}$-asymptotically normal, irrespective of $D$.
2 code implementations • 27 Oct 2017 • Susan Athey, Mohsen Bayati, Nikolay Doudchenko, Guido Imbens, Khashayar Khosravi
In this paper we study methods for estimating causal effects in settings with panel data, where some units are exposed to a treatment during some periods and the goal is estimating counterfactual (untreated) outcomes for the treated unit/period combinations.
Statistics Theory Econometrics Statistics Theory
1 code implementation • 28 Apr 2017 • Hamsa Bastani, Mohsen Bayati, Khashayar Khosravi
We prove that this algorithm is rate optimal without any additional assumptions on the context distribution or the number of arms.
5 code implementations • 4 Nov 2016 • Hakan Inan, Khashayar Khosravi, Richard Socher
Recurrent neural networks have been very successful at predicting sequences of words in tasks such as language modeling.
Ranked #34 on Language Modelling on Penn Treebank (Word Level)