Population surveys around the world face the problem of declining cooperation and participation rates of respondents. Not only can item nonresponse and unit nonresponse impair important outcome measures for inequality research such as total household disposable income; there is also a further...

Social security entitlements are a substantial source of wealth that grows in importance over the individual's lifecycle. Despite its quantitative relevance, social security wealth has been thus far omitted from wealth inequality analyses. In Germany, it is the lack of adequate micro data that...

This paper presents and compares trends in income inequality in Switzerland and Germany from 2000 to 2009 using harmonized data from the Socio-Economic Panel (SOEP) and the Swiss Household Panel (SHP). Whereas in Germany inequality has increased substantially during this period, in Switzerland...

Statistical Analysis in surveys is generally facing missing data. In longitudinal studies for some missing values there might be past or future data points available. The question arises how to successfully transform this advantage into improvedimputation strategies. In a simulation study the...

While most studies on wealth inequality focus on the inequality between households, this paper examines the distribution of wealth within couples. For this purpose, we make use of unique individual level micro data from the German Socio-Economic Panel (SOEP). In married and cohabiting couples,...

Research on wealth inequality usually focuses on real and financial assets, while pension wealth – the present value of future pension entitlements from public and company pension schemes – receives little attention. This is astonishing, given that pension plans play an important role for...

We analyze financial constraints for Ramp;D, where we account for heterogeneity among investments which has been neglected in previous literature. According to economic theory, investments should be distinguished by their degree of uncertainty, e.g. routine Ramp;D versus cutting-edge Ramp;D....

This study tests for financial constraints on Ramp;D investment and how they differ from capital investment. To identify constraints in the access to external capital, we employ a credit rating index. Our models show that internal constraints, measured by mark-ups, are more decisive for Ramp;D...