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Selecting Multiple Web Adverts - a Contextual Multi-armed Bandit with State Uncertainty

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Selecting Multiple Web Adverts - a Contextual Multi-armed Bandit with State Uncertainty. / Leslie, David Stuart; Edwards, James Anthony.

In: Journal of the Operational Research Society, 20.02.2019.

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@article{0032392225704d5a84bd9bdc55257a8d,
title = "Selecting Multiple Web Adverts - a Contextual Multi-armed Bandit with State Uncertainty",
abstract = "We present a method to solve the problem of choosing a set of adverts to display to each of a sequence of web users. The objective is to maximise user clicks over time and to do so we must learn about the quality of each advert in an online manner by observing user clicks. We formulate the problem as a novel variant of a contextual combinatorial multi-armed bandit problem. The context takes the form of a probability distribution over the user's latent topic preference, and rewards are a particular nonlinear function of the selected set and the context. These features ensure that optimal sets of adverts are appropriately diverse. We give a flexible solution method which combines submodular optimisation with existing bandit index policies. User state uncertainty creates ambiguity in interpreting user feedback which prohibits exact Bayesian updating, but we give an approximate method that is shown to work well.",
author = "Leslie, {David Stuart} and Edwards, {James Anthony}",
year = "2019",
month = "2",
day = "20",
doi = "10.1080/01605682.2018.1546650",
language = "English",
journal = "Journal of the Operational Research Society",
issn = "0160-5682",
publisher = "Taylor and Francis Ltd.",

}

RIS

TY - JOUR

T1 - Selecting Multiple Web Adverts - a Contextual Multi-armed Bandit with State Uncertainty

AU - Leslie, David Stuart

AU - Edwards, James Anthony

PY - 2019/2/20

Y1 - 2019/2/20

N2 - We present a method to solve the problem of choosing a set of adverts to display to each of a sequence of web users. The objective is to maximise user clicks over time and to do so we must learn about the quality of each advert in an online manner by observing user clicks. We formulate the problem as a novel variant of a contextual combinatorial multi-armed bandit problem. The context takes the form of a probability distribution over the user's latent topic preference, and rewards are a particular nonlinear function of the selected set and the context. These features ensure that optimal sets of adverts are appropriately diverse. We give a flexible solution method which combines submodular optimisation with existing bandit index policies. User state uncertainty creates ambiguity in interpreting user feedback which prohibits exact Bayesian updating, but we give an approximate method that is shown to work well.

AB - We present a method to solve the problem of choosing a set of adverts to display to each of a sequence of web users. The objective is to maximise user clicks over time and to do so we must learn about the quality of each advert in an online manner by observing user clicks. We formulate the problem as a novel variant of a contextual combinatorial multi-armed bandit problem. The context takes the form of a probability distribution over the user's latent topic preference, and rewards are a particular nonlinear function of the selected set and the context. These features ensure that optimal sets of adverts are appropriately diverse. We give a flexible solution method which combines submodular optimisation with existing bandit index policies. User state uncertainty creates ambiguity in interpreting user feedback which prohibits exact Bayesian updating, but we give an approximate method that is shown to work well.

U2 - 10.1080/01605682.2018.1546650

DO - 10.1080/01605682.2018.1546650

M3 - Journal article

JO - Journal of the Operational Research Society

JF - Journal of the Operational Research Society

SN - 0160-5682

ER -