Results 31 to 40 of about 151,292 (252)

Mendelian randomization analyses in ocular disease: a powerful approach to causal inference with human genetic data

open access: yesJournal of Translational Medicine, 2022
Ophthalmic epidemiology is concerned with the prevalence, distribution and other factors relating to human eye disease. While observational studies cannot avoid confounding factors from interventions, human eye composition and structure are unique, thus,
Jiaxin Li   +7 more
doaj   +1 more source

Instrumental Variables: An Econometrician's Perspective [PDF]

open access: yesSSRN Electronic Journal, 2014
I review recent work in the statistics literature on instrumental variables methods from an econometrics perspective. I discuss some of the older, economic, applications including supply and demand models and relate them to the recent applications in settings of randomized experiments with noncompliance.
openaire   +7 more sources

Two-stage least squares model averaging for instrumental variable models with exogenous variables

open access: yesStatistical Theory and Related Fields
Instrumental variable (IV) methods are widely used to address unmeasured confoundings in structural equation models. In this paper, we focus on the settings where a possibly large number of instruments and a weak correlation between the instruments and ...
Wenjun Shen, Xiaochao Xia
doaj   +1 more source

Heart Rate Variability Control Using a Biofeedback and Wearable System

open access: yesSensors, 2022
Heart rate variability is an important physiological parameter in medicine. This parameter is used as an indicator of physiological and psychological well-being and even of certain pathologies.
Eduardo Viera   +2 more
doaj   +1 more source

Causal Transmission in Reduced-Form Models

open access: yesEconometrics, 2022
We propose a method to explore the causal transmission of an intervention through two endogenous variables of interest. We refer to the intervention as a catalyst variable.
Vassilios Bazinas, Bent Nielsen
doaj   +1 more source

Identifying causal effects based on instrumental variables and distinguishing different models with data

open access: yesSichuan jingshen weisheng, 2022
The purpose of this paper was to introduce the methods of identifying causal effects based on instrumental variables, distinguishing different models with data, and using SAS software to realize calculation.
Hu Chunyan, Hu Liangping
doaj   +1 more source

A New Matrix Statistic for the Hausman Endogeneity Test under Heteroskedasticity

open access: yesEconometrics, 2023
We derive a new matrix statistic for the Hausman test for endogeneity in cross-sectional Instrumental Variables estimation, that incorporates heteroskedasticity in a natural way and does not use a generalized inverse.
Alecos Papadopoulos
doaj   +1 more source

Are Fertility Preservation Procedures Before Gonadotoxic Therapy and Hematopoietic Stem Cell Transplantation Feasible and Safe in Very Young Children? A Retrospective Cohort Study

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Fertility preservation (FP) is increasingly integrated into the care of pediatric patients exposed to gonadotoxic therapy or conditioning for hematopoietic stem cell transplantation (HSCT), yet perioperative data in infants and toddlers remain scarce.
Kerstin Saalabian   +13 more
wiley   +1 more source

Identifying instrumental variables for causal inference

open access: yesCogent Economics & Finance
We propose a procedure for identifying instrumental variables to be used in causal analyses that can preclude the effects of unobserved confounders and reverse causality.
Fernando Moreira
doaj   +1 more source

On the Estimation of Separable Demand Models

open access: yesJournal of Agricultural and Resource Economics, 1993
Alternative stochastic specification of conditional demand models are considered. The results of LaFrance concerning the inconsistency of least squares are supported, but the class of models that allow standard instrumental variable estimation is ...
David L. Edgerton
doaj   +1 more source

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