نتایج جستجو برای: fixed and random effects

تعداد نتایج: 17093635  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده ادبیات و علوم انسانی دکتر علی شریعتی 1392

a large number of single research studies on the effects of strategy-based instruction (sbi) in teaching english as a foreign or second language has been conducted so far. however, the lack of a comprehensive meta-analysis targeting the effectiveness of english language sbi is observed. moreover, the findings of experimental studies regarding the context of the english language, proficiency lev...

Journal: :international journal of health policy and management 2013
ali hussein samadi ali keshtkaran zahra kavosi sajad vahedi

background fiscal decentralization (fd) in many cases is encouraged as a strong means of improving the efficiency and equity in the provision of public goods, such as healthcare services. this issue has urged the researchers to experimentally examine the relationship between fiscal decentralization indicators and health outcomes. in this study we examine the effect of fiscal decentralization in...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه ولی عصر (عج) - رفسنجان - دانشکده ریاضی و کامپیوتر 1389

in this thesis we will present three topics. we define approximate fixed points in fuzzy normed spaces. also we obtain some necessary and sufficient conditions on the existence of? -fixed points for ? > 0. at the continue some results about approximate fixed points for a class of non-expansive maps on g-metric spaces are obtained and we define approximate fixed points in partial metric spa...

2014
Gerhard Tutz

Although each statistical unit on which measurements are taken is unique typically there is not enough information available to account totally for its uniqueness. Therefore heterogeneity among units has to be limited by structural assumptions. One classical approach is to use random effects models, which assume that heterogeneity can be described by distributional assumptions. However, inferen...

2006
Iwona Janicka I. Janicka

Meta-analysis is a standard statistical method used to combine the conclusions of individual studies that are related and the results of single study alone can not answered to deal with issues. The data are summarized by one or more outcome measure estimates along with their standard errors. The multivariate model and the variations between studies are not considered in most articles. Here we d...

1999
Peter Egger

This paper sheds some light on the problems associated with random effects gravity approaches. Arguments for the superiority of a fixed effects model are given both along intuitive and econometric lines based on a Hausman test.  2000 Elsevier Science S.A. All rights reserved.

Journal: :JORS 2008
R. Bachan B. Reilly R. Witt

This paper uses data drawn from the English Football League to model separate hazard rates for club managers for the 2001/2, 2002/3 and 2003/4 seasons. On average over the three seasons, approximately one-third of managers involuntarily exited employment status with their club. We model the hazard using a standard logistic model exploiting information on the spell at risk rather than the indivi...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان - دانشکده ریاضی 1390

the main objective in sampling is to select a sample from a population in order to estimate some unknown population parameter, usually a total or a mean of some interesting variable. a simple way to take a sample of size n is to let all the possible samples have the same probability of being selected. this is called simple random sampling and then all units have the same probability of being ch...

Journal: :international journal of pediatrics 0
sara emamgholipour sefiddashti assistant professor, department of management and health economics, school of public health, tehran university of medical sciences, tehran, iran. majid nakhae school of health management and information sciences, iran university of medical sciences, tehran, iran. ali kazemi karyani health management and economics research center, iran university of medical sciences, tehran, iran. sadegh ghazanfari department of management and health economics, school of public health, tehran university of medical science, tehran, iran.

introduction the preservation and promotion of the health in children who are one of the most vulnerable parts in any society has an important role in the health system of each country. in this study, the socioeconomic factors affecting the infant mortality in eastern mediterranean regional office (emro) countries have been examined during the time period from 2000 to 2013. materials and method...

2012
Youngjo Lee

We present the frailtyHL package for fitting semi-parametric frailty models using hlikelihood. This package allows lognormal or gamma frailties for random-effect distribution, and it fits shared or multilevel frailty models for correlated survival data. Functions are provided to format and summarize the frailtyHL results. The estimates of fixed effects and frailty parameters and their standard ...

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