Sökning: "nonresponse"
Visar resultat 1 - 5 av 16 avhandlingar innehållade ordet nonresponse.
1. Cost efficency of nonresponse rate reduction efforts : an evaluation approach
Sammanfattning : Nonresponse, the failure to obtain complete measurement on all sample elements, is an increasing problem in sample surveys. Efforts to reduce the nonresponse rate are expensive and their effect may not be as desired. LÄS MER
2. 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
3. Understanding and prioritizing crash contributing factors
Sammanfattning : Real world data on driver behavior in normal driving and critical situations are essential for car safety development. Data collection and analysis methods that provide insight into the prevalence of crash contributing factors (e.g. LÄS MER
4. Essays on Measurement Error and Nonresponse
Sammanfattning : Essay 1 deals with measurement errors. Matching survey data with administrative records provides unique opportunities to evaluate the statistical properties of respondents' answers. This paper focuses primarily on home ownership and wealth variables. LÄS MER
5. Nonresponse issues when analysing business survey data
Sammanfattning : Data issues due to nonresponse or missing data arises often in company surveys or in firm data. Missing data and nonresponse causes bias. Another problem that causes bias is omitted variables. Accordingly, it will lead to wrong conclusions. LÄS MER