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pro vyhledávání: '"Williams, Nicholas A."'
Causal mediation analyses investigate the mechanisms through which causes exert their effects, and are therefore central to scientific progress. The literature on the non-parametric definition and identification of mediational effects in rigourous ca
Externí odkaz:
http://arxiv.org/abs/2408.14620
Autor:
Williams, Nicholas J., Kabalan, Lara, Stojanovic, Ljiljana, Zolyomi, Viktor, Pyzer-Knapp, Edward O.
A significant challenge in computational chemistry is developing approximations that accelerate \emph{ab initio} methods while preserving accuracy. Machine learning interatomic potentials (MLIPs) have emerged as a promising solution for constructing
Externí odkaz:
http://arxiv.org/abs/2408.08006
The Average Treatment Effect on the Treated (ATT) is a common causal parameter defined as the average effect of a binary treatment among the subset of the population receiving treatment. We propose a novel family of parameters, Generalized ATTs (GATT
Externí odkaz:
http://arxiv.org/abs/2405.06135
Associations between pain-management treatments and opioid use disorder risk among Medicaid patients
Autor:
Rudolph, Kara E., Williams, Nicholas T., Diaz, Ivan, Forrest, Sarah, Hoffman, Katherine L., Samples, Hillary, Olfson, Mark, Doan, Lisa, Cerda, Magdalena, Ross, Rachael
Introduction: Chronic pain patients are at increased risk of opioid-misuse. Less is known about the unique risk conferred by each pain-management treatment, as treatments are typically implemented together, confounding their independent effects. We e
Externí odkaz:
http://arxiv.org/abs/2404.11802
Autor:
Williams, Nicholas, Rudolph, Kara E.
Objective: Freely preprocess drug codes recorded in electronic health records and insurance claims to drug classes that may then be used in biomedical research. Materials and Methods: We developed a drug classification pipeline for linking National D
Externí odkaz:
http://arxiv.org/abs/2404.01514
Autor:
Gilbert, Brian, Hoffman, Katherine L., Williams, Nicholas, Rudolph, Kara E., Schenck, Edward J., Díaz, Iván
We demonstrate a comprehensive semiparametric approach to causal mediation analysis, addressing the complexities inherent in settings with longitudinal and continuous treatments, confounders, and mediators. Our methodology utilizes a nonparametric st
Externí odkaz:
http://arxiv.org/abs/2403.09928
Studies often report estimates of the average treatment effect. While the ATE summarizes the effect of a treatment on average, it does not provide any information about the effect of treatment within any individual. A treatment strategy that uses an
Externí odkaz:
http://arxiv.org/abs/2401.10867
Autor:
Kidwai, Omar, Williams, Nicholas J.
Famous work of Bridgeland and Smith shows that certain moduli spaces of quadratic differentials are isomorphic to spaces of stability conditions on particular 3-Calabi-Yau triangulated categories. This result has subsequently been generalised and ext
Externí odkaz:
http://arxiv.org/abs/2401.10093
The presence of intermediate confounders, also called recanting witnesses, is a fundamental challenge to the investigation of causal mechanisms in mediation analysis, preventing the identification of natural path-specific effects. Proposed alternativ
Externí odkaz:
http://arxiv.org/abs/2401.04450
Autor:
Williams, Nicholas T., Liu, Richard, Hoffman, Katherine L., Forrest, Sarah, Rudolph, Kara E., Díaz, Iván
Non-negative two-part outcomes are defined as outcomes with a density function that have a zero point mass but are otherwise positive. Examples, such as healthcare expenditure and hospital length of stay, are common in healthcare utilization research
Externí odkaz:
http://arxiv.org/abs/2401.04263