نتایج جستجو برای: marginal causal effects

تعداد نتایج: 1630115  

خوشحال, معصومه, صدیق, سجاد, قدرتی, امین, وفایی, فریبرز,

Introduction & Objective: Due to the patients’ growing interest in the use of dental implants, medical staff should be completely aware of treatment success and prognostic factors to prevent failures. The purpose of this study was to evaluate the effect of different crown to implant ratio (C / I Ratio) in the posterior areas of the maxilla and mandible as one of the most important princip...

Journal: :Annales de l'Institut Henri Poincaré C, Analyse non linéaire 2021

Journal: :Proceedings of the ... AAAI Conference on Artificial Intelligence 2021

Estimating causal effects from observational data is not always possible due to confounding. Identifying a set of appropriate covariates (adjustment set) and adjusting for their influence can remove confounding bias; however, such often identifiable alone. Experimental allow unbiased effect estimation, but are typically limited in sample size therefore yield estimates high variance. Moreover, e...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان - دانشکده منابع طبیعی 1392

nowadays, air pollution is a global problem that has had significant growth by technology development, population growth andindustrial development. industrial development brought natural resources deterioration, more manufacturing products, and more environmental pollutants. if pollutant won’t be controlled, human-being and wildlife will face the critical risks. significant release and critical...

Journal: :Genetics research 2010
Xiaojuan Mi Kent Eskridge Dong Wang P Stephen Baenziger B Todd Campbell Kulvinder S Gill Ismail Dweikat

Quantitative trait loci (QTLs) mapping often results in data on a number of traits that have well-established causal relationships. Many multi-trait QTL mapping methods that account for correlation among the multiple traits have been developed to improve the statistical power and the precision of QTL parameter estimation. However, none of these methods are capable of incorporating the causal st...

Journal: :Journal of risk and financial management 2022

This paper introduces a machine learning approach to quantify altruism from the linguistic style of textual documents. We apply our method central question in (social) entrepreneurship: How does impact entrepreneurial success? Specifically, we examine effects on crowdfunding outcomes Initial Coin Offerings (ICOs). The main result suggests that and ICO firm valuation are negatively related. We, ...

Journal: :American journal of epidemiology 2011
Tyler J VanderWeele Stijn Vansteelandt

Estimates of additive interaction from case-control data are often obtained by logistic regression; such models can also be used to adjust for covariates. This approach to estimating additive interaction has come under some criticism because of possible misspecification of the logistic model: If the underlying model is linear, the logistic model will be misspecified. The authors propose an inve...

Journal: :American journal of epidemiology 2007
Maya L Petersen Steven G Deeks Jeffrey N Martin Mark J van der Laan

Much of epidemiology and clinical medicine is focused on estimating the effects of treatments or interventions administered over time. In such settings of longitudinal treatment, time-dependent confounding is often an important source of bias. Marginal structural models (MSMs) are a powerful tool for estimating the causal effect of a treatment using observational data, particularly when time-de...

Journal: :Statistics in medicine 2012
Stephen Burgess Simon G Thompson

Causal estimates can be obtained by instrumental variable analysis using a two-stage method. However, these can be biased when the instruments are weak. We introduce a Bayesian method, which adjusts for the first-stage residuals in the second-stage regression and has much improved bias and coverage properties. In the continuous outcome case, this adjustment reduces median bias from weak instrum...

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