Search Results for author: Ramesh Johari

Found 18 papers, 6 papers with code

Hybrid Square Neural ODE Causal Modeling

no code implementations27 Feb 2024 Bob Junyi Zou, Matthew E. Levine, Dessi P. Zaharieva, Ramesh Johari, Emily B. Fox

We encode this information in a causal loss that we combine with the standard predictive loss to arrive at a hybrid loss that biases our learning towards causally valid hybrid models.

counterfactual Counterfactual Reasoning +2

Experimenting under Stochastic Congestion

no code implementations22 Feb 2023 Shuangning Li, Ramesh Johari, Xu Kuang, Stefan Wager

We study randomized experiments in a service system when stochastic congestion can arise from temporarily limited supply and/or demand.

Experimental Design

Online Learning for Traffic Routing under Unknown Preferences

1 code implementation31 Mar 2022 Devansh Jalota, Karthik Gopalakrishnan, Navid Azizan, Ramesh Johari, Marco Pavone

at each period, we show that our approach obtains an expected regret and road capacity violation of $O(\sqrt{T})$, where $T$ is the number of periods over which tolls are updated.

Unreasonable Effectiveness of Greedy Algorithms in Multi-Armed Bandit with Many Arms

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 $k \geq \sqrt{T}$.

Multi-Armed Bandits

The Unreasonable Effectiveness of Greedy Algorithms in Multi-Armed Bandit with Many Arms

2 code implementations24 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.

Multi-Armed Bandits

Quality Selection in Two-Sided Markets: A Constrained Price Discrimination Approach

no code implementations4 Dec 2019 Bar Light, Ramesh Johari, Gabriel Weintraub

In this paper we study the following information disclosure problem in two-sided markets: If a platform wants to maximize revenue, which sellers should the platform allow to participate, and how much of its available information about participating sellers' quality should the platform share with buyers?

Vocal Bursts Valence Prediction

Cloud Storage for Multi-Service Battery Operation (Extended Version)

no code implementations17 May 2019 Mohammad Rasouli, Tao Sun, Camille Pache, Patrick Panciatici, Jean Maeght, Ramesh Johari, Ram Rajagopal

The methodology consists in modelling the problem as a two-stage stochastic optimization between high priority stochastic grid services and low priority cloud storage for stochastic end users.

Blocking RTE +1

Semi-parametric dynamic contextual pricing

no code implementations NeurIPS 2019 Virag Shah, Jose Blanchet, Ramesh Johari

Motivated by the application of real-time pricing in e-commerce platforms, we consider the problem of revenue-maximization in a setting where the seller can leverage contextual information describing the customer's history and the product's type to predict her valuation of the product.

Exploration vs. Exploitation in Team Formation

no code implementations18 Sep 2018 Ramesh Johari, Vijay Kamble, Anilesh K. Krishnaswamy, Hannah Li

An online labor platform faces an online learning problem in matching workers with jobs and using the performance on these jobs to create better future matches.

Designing Optimal Binary Rating Systems

no code implementations18 Jun 2018 Nikhil Garg, Ramesh Johari

Modern online platforms rely on effective rating systems to learn about items.

Optimal Testing in the Experiment-rich Regime

1 code implementation30 May 2018 Sven Schmit, Virag Shah, Ramesh Johari

Motivated by the widespread adoption of large-scale A/B testing in industry, we propose a new experimentation framework for the setting where potential experiments are abundant (i. e., many hypotheses are available to test), and observations are costly; we refer to this as the experiment-rich regime.

Experimental Design

Learning with Abandonment

1 code implementation ICML 2018 Ramesh Johari, Sven Schmit

Consider a platform that wants to learn a personalized policy for each user, but the platform faces the risk of a user abandoning the platform if she is dissatisfied with the actions of the platform.

Regret of Queueing Bandits

no code implementations NeurIPS 2016 Subhashini Krishnasamy, Rajat Sen, Ramesh Johari, Sanjay Shakkottai

A naive view of this problem would suggest that queue-regret should grow logarithmically: since queue-regret cannot be larger than classical regret, results for the standard MAB problem give algorithms that ensure queue-regret increases no more than logarithmically in time.

Matching while Learning

no code implementations15 Mar 2016 Ramesh Johari, Vijay Kamble, Yash Kanoria

We introduce a benchmark model with heterogeneous "workers" (demand) and a limited supply of "jobs" that arrive over time.

Online Active Linear Regression via Thresholding

no code implementations9 Feb 2016 Carlos Riquelme, Ramesh Johari, Baosen Zhang

We consider the problem of online active learning to collect data for regression modeling.

Active Learning regression

Pricing and Referrals in Diffusion on Networks

1 code implementation22 Sep 2015 Matt V. Leduc, Matthew O. Jackson, Ramesh Johari

When a new product or technology is introduced, potential consumers can learn its quality by trying the product, at a risk, or by letting others try it and free-riding on the information that they generate.

Economics Computer Science and Game Theory Social and Information Networks Physics and Society 91D30, 05C82, 91A43

Committing Bandits

no code implementations NeurIPS 2011 Loc X. Bui, Ramesh Johari, Shie Mannor

In the second phase the decision maker has to commit to one of the arms and stick with it.

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