Sökning: "semiparametric"

Visar resultat 6 - 10 av 19 avhandlingar innehållade ordet semiparametric.

  1. 6. Equality of opportunity, heterogeneity and poverty

    Författare :William Nilsson; Karl-Gustaf Löfgren; Tomas Sjögren; Anders Björklund; Umeå universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Economics; Equality of opportunity; Semiparametric; Poverty; Heterogeneity; State dependence; Twins; Unemployment; Divorce; Spousal response; Selection; Panel data; Nationalekonomi; Economics; Nationalekonomi; nationalekonomi; Economics;

    Sammanfattning : Paper [I] studies equality of opportunity in Sweden. The distinction between circumstances that constrain an individual’s opportunities and the individual choices also affecting a particular outcome is the main idea of theories of equality of opportunity. LÄS MER

  3. 7. Essays on Capital Structure

    Författare :Hossein Asgharian; Nationalekonomiska institutionen; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; economic theory; econometrics; Economics; Extreme Bound Analysis; Selection bias; Lisrel; Semiparametric; Nonparametric; Financial distress; Panel data analysis; Leverage; Capital structure; economic systems; economic policy; Nationalekonomi; ekonometri; ekonomisk teori; ekonomiska system; ekonomisk politik;

    Sammanfattning : Chapter 2 analyses the relationship between capital structure and industry classification of Swedish firms. This study also analyses the determinants of the capital structure at the industry level. LÄS MER

  4. 8. Estimators of semiparametric truncated and censored regression models

    Författare :Maria Karlsson; Thomas Laitila; Göran Broström; Kenneth Carling; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Statistics; LTRC; consistency; asymtotic normality; bootstrap; interpurchase intervals; Statistik; Statistics; Statistik; Statistics; statistik;

    Sammanfattning : This thesis contributes in several ways to the existing knowledge on estimation of truncated, censored, and left truncated right censored (LTRC) regression models. Three new semiparametric estimators are proposed, allowing for asymmetric error distributions. LÄS MER

  5. 9. Sensitivity Analysis of Untestable Assumptions in Causal Inference

    Författare :Mathias Lundin; Xavier de Luna; Maria Karlsson; Sune Karlsson; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Observational studies; semiparametric regression; unconfoundedness; Causal inference; Statistics; Statistik; Statistics; statistik;

    Sammanfattning : This thesis contributes to the research field of causal inference, where the effect of a treatment on an outcome is of interest is concerned. Many such effects cannot be estimated through randomised experiments. For example, the effect of higher education on future income needs to be estimated using observational data. LÄS MER

  7. 10. Spatial sampling and prediction

    Författare :Lina Schelin; Sara Sjöstedt-de Luna; Silvelyn Zwanzig; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Auxiliary variables; Censoring; Inclusion probabilities; Kriging; Local pivotal method; Minimum detection limit; Prediction intervals; Representative sample; Spatial process; Spatial sampling; Semiparametric bootstrap; Mathematical Statistics; matematisk statistik;

    Sammanfattning : This thesis discusses two aspects of spatial statistics: sampling and prediction. In spatial statistics, we observe some phenomena in space. Space is typically of two or three dimensions, but can be of higher dimension. LÄS MER