Search for dissertations about: "selection bias"

Showing result 1 - 5 of 181 swedish dissertations containing the words selection bias.

  2. 1. Epidemiology of dementia - with particular focus on time trends and methodology

    Author : Hanna Wetterberg; Göteborgs universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Dementia; epidemiology; selection bias; mortality; time trends; Epidemiology; Selection bias; Mortality; Time trends;

    Abstract : Dementia is a clinical syndrome characterised by deterioration in cognitive functions, which causes personal suffering and societal challenges. Studies investigating the incidence, prevalence, and mortality of dementia are needed for the understanding of the societal and economic burden of the disease. READ MORE

  4. 2. Residential Mobility and Neighbourhood Effects: A Holistic Approach

    Author : Lina Hedman; Roger Andersson; Irene Molina; Ronald van Kempen; Uppsala universitet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; neighbourhood effect; residential mobility; selection; method; bias; Social and Economic Geography; Kulturgeografi;

    Abstract : The number of studies estimating neighbourhood effects has increased rapidly during the last two decades. Although results from these studies vary, a majority find at least small effects. READ MORE

  5. 3. Incumbent Renomination : Accountability and Gender Bias

    Author : Michal Grahn; Elin Bjarnegård; Johanna Kantola; Uppsala universitet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; political recruitment; party politics; proportional representation; gender; incumbency; re-selection; accountability; representation; delegation; preference voting; flexible lists; Czech Republic; Slovakia.; Statskunskap; Political Science;

    Abstract : Party recruiters in proportional-representation (PR) systems are forced to do what their majoritarian counterparts are not: they need to rank-order all their candidates on the party ballots based on whom they most wish to get elected. Consequently, new candidates and incumbents alike compete for a limited number of electable ballot slots. READ MORE

  6. 4. The Effects of Mutation and Selection on the Rate and Pattern of Molecular Evolution in Birds

    Author : Sofia Berlin; Hans Ellegren; Adam Eyre-Walker; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Molecular genetics; substitution rate; diversity; selection; male mutation bias; birds; Genetik; Genetics; Genetik;

    Abstract : By comparing sequence diversity and divergence on sex chromosomes one can study how the rate of evolution in affected by mutation and/or selection. The rate of mutation in male biased, meaning that relatively more mutations are created in the male germ line than in the female. READ MORE

  7. 5. Sexual conflict and selection on pistil and pollen traits

    Author : Josefin Madjidian; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Antagonistic trait; Collinsia heterophylla; delayed stigma receptivity; direct cost; first-donor advantage; gender bias; heritability; indirect benefit; mate choice; mixed-mating system; paternal diversity; pollen competition; pollen deposition; pollen load size; pollen tube growth rate; self-compatibility; semantics; sexual conflict; sexual selection; sexually antagonistic co-evolution;

    Abstract : The incidence of sexual selection in plants is today acknowledged, however, just as in animals, evolution and maintenance of mate choice is gravely underexplored. Moreover, the potential for sexual conflicts to occur in plants has only been assessed empirically to a very limited degree. READ MORE