Search Results for author: Rob Cornish

Found 7 papers, 5 papers with code

Marginal Density Ratio for Off-Policy Evaluation in Contextual Bandits

1 code implementation NeurIPS 2023 Muhammad Faaiz Taufiq, Arnaud Doucet, Rob Cornish, Jean-Francois Ton

Off-Policy Evaluation (OPE) in contextual bandits is crucial for assessing new policies using existing data without costly experimentation.

Causal Inference Multi-Armed Bandits +1

Causal Falsification of Digital Twins

1 code implementation17 Jan 2023 Rob Cornish, Muhammad Faaiz Taufiq, Arnaud Doucet, Chris Holmes

We consider how to assess the accuracy of a digital twin using real-world data.

Causal Inference

Conformal Off-Policy Prediction in Contextual Bandits

no code implementations9 Jun 2022 Muhammad Faaiz Taufiq, Jean-Francois Ton, Rob Cornish, Yee Whye Teh, Arnaud Doucet

Most off-policy evaluation methods for contextual bandits have focused on the expected outcome of a policy, which is estimated via methods that at best provide only asymptotic guarantees.

Conformal Prediction Multi-Armed Bandits +1

Deep Generative Pattern-Set Mixture Models for Nonignorable Missingness

1 code implementation5 Mar 2021 Sahra Ghalebikesabi, Rob Cornish, Luke J. Kelly, Chris Holmes

We propose a variational autoencoder architecture to model both ignorable and nonignorable missing data using pattern-set mixtures as proposed by Little (1993).

Imputation

Variational Inference with Continuously-Indexed Normalizing Flows

1 code implementation10 Jul 2020 Anthony Caterini, Rob Cornish, Dino Sejdinovic, Arnaud Doucet

Continuously-indexed flows (CIFs) have recently achieved improvements over baseline normalizing flows on a variety of density estimation tasks.

Bayesian Inference Density Estimation +1

Localised Generative Flows

no code implementations25 Sep 2019 Rob Cornish, Anthony Caterini, George Deligiannidis, Arnaud Doucet

We argue that flow-based density models based on continuous bijections are limited in their ability to learn target distributions with complicated topologies, and propose localised generative flows (LGFs) to address this problem.

Density Estimation Normalising Flows

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