Sökning: "Thomas Laitila"
Hittade 5 avhandlingar innehållade orden Thomas Laitila.
1. Estimation in Truncated and Censored Regressions
Sammanfattning : .... LÄS MER
2. Cut-off and coordinated survey sampling
Sammanfattning : The problem of estimation from a sample is well known and its solutions are the foundation for the sample surveys conducted at e.g. national statistical institutes. This dissertation looks at the estimation problem from the perspective of business survey methodology. LÄS MER
3. Estimators of semiparametric truncated and censored regression models
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
4. Calibration Adjustment for Nonresponse in Sample Surveys
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
5. On-Site Sampling in Economic Valuation Studies
Sammanfattning : A commonly used sampling design in economic valuation studies is on-sitesampling. If this sampling design is used, the sampling inclusion probabil-ities may be correlated with respondents’ valuations, invalidating welfaremeasures derived from estimates of the probit model. LÄS MER