Sökning: "Statistical matching"

Visar resultat 1 - 5 av 54 avhandlingar innehållade orden Statistical matching.

  1. 1. Causal inference and case-control studies with applications related to childhood diabetes

    Författare :Emma Persson; Ingeborg Waernbaum; Xavier de Luna; Gisela Dahlquist; Stijn Vansteelandt; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; covariate selection; design-weighted estimation; marginal effect; matching; register study; treatment effect; type 1 diabetes mellitus; Statistics; statistik;

    Sammanfattning : This thesis contributes to the research area of causal inference, where estimation of the effect of a treatment on an outcome of interest is the main objective. Some aspects of the estimation of average causal effects in observational studies in general, and case-control studies in particular, are explored. LÄS MER

  3. 2. Covariate selection and propensity score specification in causal inference

    Författare :Ingeborg Waernbaum; Xavier de Luna; Elena Stanghellini; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Covariate selection; graphical models; matching; observational studies; treatment effects; unconfoundedness; Statistics; Statistik;

    Sammanfattning : This thesis makes contributions to the statistical research field of causal inference in observational studies. The results obtained are directly applicable in many scientific fields where effects of treatments are investigated and yet controlled experiments are difficult or impossible to implement. LÄS MER

  4. 3. Essays on Household Behavior and Time-Use

    Författare :Daniel Hallberg; Daniel S. Hamermesh; Uppsala universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Economics; Time-use; Household behavior; Slutsky matrix; Income-pooling; Household labor supply; Child care; Family economics; Simultaneous equation system; Process benefits; Synchronous leisure; Working hours; Togetherness; Statistical matching; Aggregation bias; House price; Volume of trade; Search; Nationalekonomi; Tidsanvändning; Hushållsbeteende; Slutsky matris; Inkomstsammanslagning; Hushållets arbetsutbud; Barnomsorg; Familjeekonomi; Simultana ekvationssystem; Aktivitetsnytta; Samtidig fritid; Arbetstider; Samhörighet; Statistisk matching; Aggregeringsbias; Huspriser; Omsättningsvolym; Sökning.; Economics; Nationalekonomi; nationalekonomi; Economics;

    Sammanfattning : Essay 1 studies the household's decision to supply labor and tests if the so-called unitary model holds. What is subject to a test is the resulting symmetry of the Slutsky matrix, i.e., that the compensated cross-wage effects are equal. LÄS MER

  5. 4. Nonparametric Statistical Inference for Entropy-type Functionals

    Författare :David Källberg; Oleg Seleznjev; Timo Koski; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; entropy estimation; Rényi entropy; divergence estimation; quadratic density functional; U-statistics; consistency; asymptotic normality; Poisson convergence; stationary m-dependent sequence; inter-point distances; entropy maximizing distribution; two-sample problem; approximate matching; Mathematical Statistics; matematisk statistik;

    Sammanfattning : In this thesis, we study statistical inference for entropy, divergence, and related functionals of one or two probability distributions. Asymptotic properties of particular nonparametric estimators of such functionals are investigated. We consider estimation from both independent and dependent observations. LÄS MER

  7. 5. Compound Processing for Phrase-Based Statistical Machine Translation

    Författare :Sara Stymne; Lars Ahrenberg; Joakim Nivre; Alexander Fraser; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Machine translation; compounds; factored translation; statistical machine translation; computational linguistics; Computational linguistics; Datorlingvistik; Language technology; Språkteknologi; Computer science; Datavetenskap;

    Sammanfattning : In this thesis I explore how compound processing can be used to improve phrase-based statistical machine translation (PBSMT) between English and German/Swedish. Both German and Swedish generally use closed compounds, which are written as one word without spaces or other indicators of word boundaries. LÄS MER