Sökning: "Sample Selection"

Visar resultat 11 - 15 av 241 avhandlingar innehållade orden Sample Selection.

  1. 11. Gotta survey somebody : Methodological challenges in population studies of older people

    Författare :Susanne Kelfve; Carin Lennartsson; Mats Thorslund; Mark D Hayward; Stockholms universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Population studies; Older people; Representativeness; Survey design; Non-response; Sample selection; Selective attrition; Social inequality; Health outcomes; Sociology; sociologi;

    Sammanfattning : Conducting representative surveys of older people is challenging. This thesis aims to analyze a) the characteristics of individuals at risk of being underrepresented in surveys of older people, b) the systematic errors likely to occur as a result of these selections, and c) whether these systematic errors can be minimized by weighting adjustments. LÄS MER

  3. 12. From Trade Preferences to Trade Facilitation

    Författare :Maria Persson; Nationalekonomiska institutionen; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Developing countries; EU trade preferences; Trade Facilitation; Gravity model; ACP; EU; Economic Partnership Agreements; Sample Selection; Extensive and Intensive Margins of Trade; Export Diversification; North-South Trade; Homogeneous and Differentiated Goods;

    Sammanfattning : The main theme of the thesis is how to increase trade between the European Union (EU) and developing countries. Two available policy options are assessed: trade preferences and trade facilitation. LÄS MER

  4. 13. The Immune System in the Oldest-Old : Clinical and Immunological Studies in the NONA Immune Cohort

    Författare :Bengt-Olof Nilsson; Jan Ernerudh; Anders Wikby; Sture Löfgren; Karlis Pauksens; Linköpings universitet; []
    Nyckelord :Elderly; selection; health status; lymphocyte subsets; CD8; CMV; cytomegalovirus; immune risk; immune risk phenotype; IRP; T-cells; interleukin 6; IL-6; survival; mortality; antinuclear antibodies; ANA; ageing; immunosenescence; MEDICINE; MEDICIN;

    Sammanfattning : The oldest-old (people aged 80 or older) constituted 5 % of the population in Sweden in 2000, an increase from 1.5 % fifty years earlier. The immune system undergoes dramatic changes at high age, sometimes referred to as “immunosenescence”. LÄS MER

  5. 14. Estimating Interviewer Effects in Sample Surveys : Some Contributions

    Författare :Peter Lundquist; Stig Danielsson; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Response variance; survey nonsampling error; interviewer effects; interpenetration; power; Statistics; Statistik;

    Sammanfattning : This thesis focuses on measurement errors that could be ascribed to the interviewers. To study interviewer variability a measurement error model is formulated which makes a clear distinction between three sources of randomness: the sample selection, interviewer assignment, and interviewing. LÄS MER

  7. 15. Personnel selection in tactical intervention units

    Författare :Peter G Tedeholm; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Amid the increasing complexities and unpredictability of terrorism, the competence of tactical Intervention units is important. This doctoral thesis examines tactical intervention units, emphasizing the work-related characteristics of applicants and officers. LÄS MER