منابع مشابه
Flexible parametric measurement error models.
Inferences in measurement error models can be sensitive to modeling assumptions. Specifically, if the model is incorrect, the estimates can be inconsistent. To reduce sensitivity to modeling assumptions and yet still retain the efficiency of parametric inference, we propose using flexible parametric models that can accommodate departures from standard parametric models. We use mixtures of norma...
متن کاملFurther Development of Flexible Parametric Models for Survival Analysis
Royston and Parmar (2002) developed a class of flexible parametric survival models that were programmed in Stata with the command stpm (Royston 2001). In this paper we introduce a new command, stpm2, that extends the methodology. New features of stpm2 include (i) improvement in the way timedependent covariates are modeled, with these effects far less likely to be over parameterized, (ii) the ab...
متن کاملFitting Flexible Parametric Regression Models with GLDreg in R
This article outlines the functionality of the GLDreg package in R which fits parametric regression models using generalized lambda distributions via maximum likelihood estimation and L moment matching. The main advantage of GLDreg is the provision of robust regression lines and smooth regression quantiles beyond the capabilities of existing known methods. The GLDreg package in R is designed to...
متن کاملIncident Duration Modeling Using Flexible Parametric Hazard-Based Models
Assessing and prioritizing the duration time and effects of traffic incidents on major roads present significant challenges for road network managers. This study examines the effect of numerous factors associated with various types of incidents on their duration and proposes an incident duration prediction model. Several parametric accelerated failure time hazard-based models were examined, inc...
متن کاملParametric Models for Biomarkers Based on Flexible Size Distributions
Recent advances in social science surveys include collection of biological samples. Although biomarkers offer a large potential for social science and economic research, they impose a number of statistical challenges, often being distributed asymmetrically with heavy tails. Using data from the UK Household Panel Survey (UKHLS), we illustrate the comparative performance of a set of flexible para...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Stata Journal: Promoting communications on statistics and Stata
سال: 2013
ISSN: 1536-867X,1536-8734
DOI: 10.1177/1536867x1301300405