The definition and operationalization of wealth information in population surveys and the corresponding microdata requires a wide range of more or less normative assumptions. However, the decisions made in both the pre- and post-data-collection stage may interfere considerably with the...

The definition and operationalization of wealth information in population surveys and the corresponding microdata requires a wide range of more or less normative assumptions. However, the decisions made in both the pre- and post-data-collection stage may interfere considerably with the...

Statistical Analysis in surveys is often facing missing data. As case-wise deletion and single imputation prove to have undesired properties, multiple imputation remains as a measure to handle this problem. In a longitudinal study, where for some missing values past or future data points might...

This paper deals with the question of selectivity of missing data on income questions in large panel surveys due to item-non-response and with imputation as one alternative strategy to cope with this issue. In contrast to cross-section surveys, the imputation of missing values in panel data can...

The definition and operationalization of wealth information in population surveys and the corresponding microdata requires a wide range of more or less normative assumptions. However, the decisions made in both the pre- and post-data-collection stage may interfere considerably with the...

In Germany, there is an ongoing debate about how to increase the efficiency of the social security system. The aim of this paper is to simulate different financing systems for Germany with its typical Conservative welfare state regime. For our analysis, we rely on the European static...

Eine verpflichtende Altersvorsorge soll der besonders bei den Solo-Selbstständigen vermuteten Altersarmutsgefährdung vorbeugen. Die empirische Analyse offenbart aber, dass sich das Armutsrisiko sowohl während der Erwerbsphase als auch im Alter nicht auf die Gruppe der Selbstständigen ohne...

A particular shortcoming of panel surveys is potential bias arising from selective attrition. Based on data from the German Socio-Economic Panel Study (SOEP) we analyze potential artifacts (level, structure, inequality of income) by comparing results from two independently drawn panel...