In self-reported data usually a phenomenon called 'heaping' occurs, i.e. survey participants round the values of their income, weight or height to some degree. Additionally, respondents may be more prone to round off or up due to social desirability. By ignoring the heaping process a severe bias...

Panel attrition has not only the potential to bias population estimates but it may also inflate the variance of the estimates from panel surveys. Thus it is essential for an ongoing panel survey to monitor not only the size of the panel attrition and the potential biases that may occur but also...

Income effects of unemployment and involuntary short-time work are investigated in the context of the East German transformation process from a planned socialistic economy to a market-oriented economy. Theoretical considerations from human capital theory are derived for the income effects in...