Mixed mode designs are increasingly important in surveys and large longitudinal studies are progressively moving to or considering such a design. In this context our knowledge regarding the impact of mixing modes on data quality indicators in longitudinal studies is sparse. This study tries to...

Relatively little is known about the micro-level dynamics of over-indebtedness and associated social, health and other outcomes, and the role of formal debt advice in this process. To rectify this, a large-scale longitudinal survey has been proposed. However, such a survey would face several...