Effects of Changing Modes on Item Nonresponse in Panel Surveys Adjusting for Selection Bias in Nonprobability Samples by Empirical Likelihood Approach Design and Sample Size Determination for Experiments on Nonresponse Followup using a Sequential Regression Model Estimating Intra-Regional Inequality with an Application to German Spatial Planning Regions Constructing Building Price Index Using Administrative Data From Quarterly to Monthly Turnover Figures Using Nowcasting Methods