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pro vyhledávání: '"Hadad, Vitor"'
Autor:
Athey, Susan, Byambadalai, Undral, Hadad, Vitor, Krishnamurthy, Sanath Kumar, Leung, Weiwen, Williams, Joseph Jay
We design and implement an adaptive experiment (a ``contextual bandit'') to learn a targeted treatment assignment policy, where the goal is to use a participant's survey responses to determine which charity to expose them to in a donation solicitatio
Externí odkaz:
http://arxiv.org/abs/2211.12004
It has become increasingly common for data to be collected adaptively, for example using contextual bandits. Historical data of this type can be used to evaluate other treatment assignment policies to guide future innovation or experiments. However,
Externí odkaz:
http://arxiv.org/abs/2106.02029
Computationally efficient contextual bandits are often based on estimating a predictive model of rewards given contexts and arms using past data. However, when the reward model is not well-specified, the bandit algorithm may incur unexpected regret,
Externí odkaz:
http://arxiv.org/abs/2102.13240
Tractable contextual bandit algorithms often rely on the realizability assumption - i.e., that the true expected reward model belongs to a known class, such as linear functions. In this work, we present a tractable bandit algorithm that is not sensit
Externí odkaz:
http://arxiv.org/abs/2010.13013
Adaptive experiment designs can dramatically improve statistical efficiency in randomized trials, but they also complicate statistical inference. For example, it is now well known that the sample mean is biased in adaptive trials. Inferential challen
Externí odkaz:
http://arxiv.org/abs/1911.02768
Many learning algorithms require categorical data to be transformed into real vectors before it can be used as input. Often, categorical variables are encoded as one-hot (or dummy) vectors. However, this mode of representation can be wasteful since i
Externí odkaz:
http://arxiv.org/abs/1908.09874
Publikováno v:
Proceedings of the National Academy of Sciences of the United States of America, 2021 Apr . 118(15), 1-10.
Externí odkaz:
https://www.jstor.org/stable/27040099
Akademický článek
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Autor:
Athey, Susan, Bergstrom, Katy, Hadad, Vitor, Jamison, Julian C., Ozler, Berk, Parisotto, Luca, Sama, Julius Dohbit
Long-acting reversible contraceptives are highly effective in preventing unintended pregnancies, but take-up remains low. This paper analyzes a randomized controlled trial of interventions addressing two barriers to long-acting reversible contracepti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______2456::e256013e0e49af3af2cbe9a534f80afa
https://hdl.handle.net/10986/36304
https://hdl.handle.net/10986/36304
Autor:
Baisi Hadad, Vitor
Thesis advisor: Stefan Hoderlein
This dissertation is divided into two parts. Part I - Dynamic Kidney Exchange In recent years, kidney paired donation (KPD) has an emerged as an attractive alternative for end-stage renal disease patients with in
This dissertation is divided into two parts. Part I - Dynamic Kidney Exchange In recent years, kidney paired donation (KPD) has an emerged as an attractive alternative for end-stage renal disease patients with in
Externí odkaz:
http://hdl.handle.net/2345/bc-ir:107962