Sökning: "inverse probability weighting"

Visar resultat 1 - 5 av 12 avhandlingar innehållade orden inverse probability weighting.

1. 1. Calibration Adjustment for Nonresponse in Sample Surveys

   Författare :Bernardo João Rota; Thomas Laitila; Sune Karlsson; Risto Lehtonen; Örebro universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Auxiliary variables; Calibration; Nonresponse; principal com-ponents; regression estimator; response probability; survey sampling; two-step estimator; variance estimator; weighting; Statistics; Statistik;

   Sammanfattning : In this thesis, we discuss calibration estimation in the presence of nonresponse with a focus on the linear calibration estimator and the propensity calibration estimator, along with the use of different levels of auxiliary information, that is, sample and population levels. This is a fourpapers- based thesis, two of which discuss estimation in two steps. LÄS MER

3. 2. Optimal Subsampling Designs Under Measurement Constraints

   Författare :Henrik Imberg; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; inverse probability weighting; unequal probability sampling; optimal design; active sampling; M-estimation;

   Sammanfattning : We consider the problem of optimal subsample selection in an experiment setting where observing, or utilising, the full dataset for statistical analysis is practically unfeasible. This may be due to, e.g., computational, economic, or even ethical cost-constraints. LÄS MER

4. 3. Some Aspects of Propensity Score-based Estimators for Causal Inference

   Författare :Ronnie Pingel; Johan Lyhagen; Theis Lange; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; correlation; treatment effect; inverse probability weighting; local linear estimator; matching; multicollinearity; observational study.; Statistics; Statistik;

   Sammanfattning : This thesis consists of four papers that are related to commonly used propensity score-based estimators for average causal effects.The first paper starts with the observation that researchers often have access to data containing lots of covariates that are correlated. LÄS MER

5. 4. From Welfare to Work : Financial Incentives, Active Labor Market Policies, and Integration Programs

   Författare :Lillit Ottosson; Eva Mörk; Anna Sjögren; Ulrika Vikman; Alexander Willén; Uppsala universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Social assistance; Welfare; Labor supply; Public sector employment programs; Cost-shifting; Dynamic inverse probability weighting; Refugees; Integration; Active labor market policies; Language support; Economics; Nationalekonomi;

   Sammanfattning : Essay I: I study the effects of increased social assistance (SA) generosity by exploiting exogenous variation induced by a ruling in the Swedish Supreme Administrative Court in 1993, mandating local governments to provide a minimum level of untied SA payments. The new rule forced some local governments to increase their SA generosity, while others were unaffected as they already complied with the stricter standards. LÄS MER

7. 5. Essays on Prospect Theory and the Statistical Modeling of Financial Returns

   Författare :Martin Ågren; Annika Alexius; Rolf Larsson; Enrico De Giorgi; Uppsala universitet; []
   Nyckelord :Economics; Nationalekonomi;

   Sammanfattning : This thesis consists of three self-contained essaysEssay 1 presents an empirical study of volatility spillover from oil prices to stock markets within an asymmetric BEKK model. Using weekly data on the aggregate stock markets of Japan, Norway, Sweden, the U.K., and the U. LÄS MER