This study was prepared by Andreas Kuhlmann, while he was working with the Ifo Institute for Economic Research. It was completed in September 2006 and was accepted as a Ph.D. thesis by the Economics Department of the University of Munich. The subject of this study is the analysis of network...

In a large scale survey, we are usually concerned with estimation ofsome characteristics of interest for a large area (e.g., a country).But we are frequently interested in estimating similarcharacteristics for a subpopulation using the same survey data. Thedirect survey estimator which utilizes...