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Causal Inference with Two-Stage Logistic Regression - Accuracy, Precision, and Application

Cai, Bing - 2010

Two-stage predictor substitution (2SPS) and the two-stage residual inclusion (2SRI) are two approaches to instrumental variable (IV) analysis. While 2SPS and 2SRI with linear models are well-studied methods of causal inference, the properties of 2SPS and 2SRI for logistic binary outcomes have...

Persistent link: https://www.econbiz.de/10009439053

Semiparametric Estimation of ROC Curve Under Test-Result-Dependent Sampling

Ma, Junling; Wang, Xiaofei; George, Stephen - 2010

The receiver operating characteristic (ROC) curve may be used to evaluate the performance of a biomarker measured on continuous scale to predict disease status or clinical condition. Motivated by the need for novel study designs with better estimation efficiency and reduced study cost, we...

Persistent link: https://www.econbiz.de/10009468304

Nonparametric Estimation of AUC and Partial AUC under Test-Result-Dependent Sampling

Wang, Xiaofei; Ma, Junling; George, Stephen L - 2010

The area under a ROC curve (AUC) and partial area under a ROC curve (pAUC) are important summary measures useful in assessing the accuracy of a diagnostic test or a biomarker in discriminating true disease status. We consider nonparametric estimation of AUC and pAUC under a test-result-dependent...

Persistent link: https://www.econbiz.de/10009468312

Some Topics in Missing Data and Adaptive Confidence Intervals. Some Topics in Missing Data and Adaptive Confidence Intervals.

Zhou, Yan - 2009

When data are missing at random, the missing-data mechanism can be ignored but this assumption is not always intuitive for general patterns of missing data. In part I, we consider maximum likelihood (ML) estimation for a non-ignorable mechanism which is called almost missing at random (AMAR). We...

Persistent link: https://www.econbiz.de/10009476653

An Asymptotic Analysis of the Logrank Test

Strawderman, Robert L. - 1997

Asymptotic expansions for the null distribution of thelogrank statistic and its distribution under local proportionalhazards alternatives are developed in the case of iid observations.The results, which are derived from the work of Gu (1992) andTaniguchi (1992), are easy to interpret, and...

Persistent link: https://www.econbiz.de/10009477088

Mixtures of Varying Coefficient Models for Longitudinal Data with Discrete or Continuous Nonignorable Dropout

Hogan, Joseph W.; Lin, Xihong; Herman, Benjamin - 2004

The analysis of longitudinal repeated measures data is frequently complicated by missing data due to informative dropout. We describe a mixture model for joint distribution for longitudinal repeated measures, where the dropout distribution may be continuous and the dependence between response...

Persistent link: https://www.econbiz.de/10009477333

Semiparametric estimation exploiting covariate independence in two-phase randomized trials.

Dai, James Y; LeBlanc, Michael; Kooperberg, Charles - 2009

Recent results for case-control sampling suggest when the covariate distribution is constrained by gene-environment independence, semiparametric estimation exploiting such independence yields a great deal of efficiency gain. We consider the efficient estimation of the treatment-biomarker...

Persistent link: https://www.econbiz.de/10009483614

Software Internationalization: A Framework Validated Against Industry Requirements for Computer Science and Software Engineering Programs

Vu, John Huan - 2010

In 2001, the ACM and IEEE Computing Curriculum stated that it was necessary to address "the need to develop implementation models that are international in scope and could be practiced in universities around the world." With increasing connectivity through the internet, the move towards a global...

Persistent link: https://www.econbiz.de/10009485610

Anreizregulierung von Stromübertragungsnetzen: Eine Systemanalyse in Bezug auf ausgewählte Renditeeffekte

Dehmel, Felix - 2011

Regulierungskonzepte, eine Aufarbeitung der Marktgegebenheiten sowie eine ausführliche Beschreibung der deutschen Anreizregulierung von … Investitionen setzen. Kern der Anreizregulierung stellt eine Formel dar, anhand derer sich eine Erlösobergrenze (EO) in Abhängigkeit … hand. Core of the German incentive regulation (Anreizregulierung) is a mathematical formula which enables to calculate a …

Persistent link: https://www.econbiz.de/10009447141

Die Liberalisierung des deutschen Gasmarktes

Stäck, Boris - 2009

weitere Marktöffnung, der Einführung eines neuen Bilanzkreisregimes sowie dem Start der Anreizregulierung wurden wichtige …

Persistent link: https://www.econbiz.de/10009454725