Sökning: "covariates the third variables"

Visar resultat 1 - 5 av 7 avhandlingar innehållade orden covariates the third variables.

  1. 1. Bilingual education cognitive development and school achievement : a study of the bilingual programs for Tibetan children

    Författare :Yu Qiang; Katrin Goldstein Kyaga; Stockholms universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; bilingualism; bilingual education; cognitive development; threshold hypothesis; study variable; covariates the third variables ; path analysis; direct effects; total effects.; internationell pedagogik; International Education;

    Sammanfattning : This study examines the effects of two models of school bilingual programs on Tibetan children's cognitive development and school achievement.Based on the findings of empirical studies, Cummins' threshold theory was critically evaluated. LÄS MER

  3. 2. Methods for improving covariate balance in observational studies

    Författare :Philip Fowler; Xavier de Luna; Ingeborg Waernbaum; Martin Huber; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; causal effect; coarsening; discretisation; proxy variables; register study; swedish social insurance agency; unobserved variables;

    Sammanfattning : This thesis contributes to the field of causal inference, where the main interest is to estimate the effect of a treatment on some outcome. At its core, causal inference is an exercise in controlling for imbalance (differences) in covariate distributions between the treated and the controls, as such imbalances otherwise can bias estimates of causal effects. LÄS MER

  4. 3. Income Generation in the African and Coloured Population: Three essays on the origins of household incomes in South Africa

    Författare :Sten Dieden; Göteborgs universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Africa; South Africa; household incomes; income sources; inequality; labour; unemployment; core; periphery; multinomial logit; endogeneity;

    Sammanfattning : The dissertation comprises three empirical analyses focusing on the origins of South African households? income sources. The income sources are categorized to reflect the households? varying extent of economic core sector integration. LÄS MER

  5. 4. Bayesian Modeling of Conditional Densities

    Författare :Feng Li; Mattias Villani; Sylvia Frühwirth-Schnatter; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Bayesian inference; Density estimation; smooth mixtures; surface regression; copulas; Markov chain Monte Carlo; Statistics; statistik;

    Sammanfattning : This thesis develops models and associated Bayesian inference methods for flexible univariate and multivariate conditional density estimation. The models are flexible in the sense that they can capture widely differing shapes of the data. The estimation methods are specifically designed to achieve flexibility while still avoiding overfitting. LÄS MER

  7. 5. Self-rated Health with special reference to Prevalence, Determinants and Consequences

    Författare :Christina Halford; Kurt Svärdsudd; Bengt Arnetz; Lisa Ekselius; Kristina Sundquist; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Self-rated health; determinants; consequences; Public health science; Folkhälsovetenskap; Social Medicine; Socialmedicin;

    Sammanfattning : Objectives: The overall aim was to investigate determinants and consequences of global non-comparative self-ratings of health (SRH). Concerning determinants, the aim was more specifically to investigate the association between age, year of investigation, stress-theory based psychobiological variables, and SRH. LÄS MER