Design and analysis of response selective samples in observational studies

• Outcome dependent sampling may increase efficiency in observational studies. It is however not always obvious how to sample efficiently, and how to analyze the resulting data without introducing bias. This thesis describes a general framework for efficiency calculations in multistage sampling, with focus on what is sometimes referred to as ascertainment sampling. A method for correcting for the sampling scheme in analysis of ascertainment samples is also presented. Simulation based methods are used to overcome computational issues in both efficiency calculations and analysis of data.

Ämnesord

NATURVETENSKAP  -- Matematik -- Sannolikhetsteori och statistik (hsv//swe)

NATURAL SCIENCES  -- Mathematics -- Probability Theory and Statistics (hsv//eng)

Nyckelord

ascertainment

missing data

outcome dependent sampling

response selective samples

sequential design

stochastic EM algorithm

Mathematical statistics

Matematisk statistik

Mathematical Statistics

matematisk statistik

Publikations- och innehållstyp

vet (ämneskategori)

dok (ämneskategori)