Design and implementation of an online weekly survey to study unintended pregnancies: preliminary results • Jennifer S. Barber, University of Michigan ; Yasamin Kusunoki, University of Michigan ; Heather H. Gatny, University of Michigan

Survey data vs. register data: a comparison of indicators in fertility research • Ina Jaschinski, Vienna Institute of Demography ; Kryštof Zeman, Vienna Institute of Demography

Cross-nationally equivalent data accuracy? Item nonresponse analysis of the generations and gender surveys and implications for international comparative research • Andrej Kveder, Netherlands Interdisciplinary Demographic Institute (NIDI) ; Nicole Hiekel, Netherlands Interdisciplinary Demographic Institute (NIDI) ; Julia Mikolai, Utrecht University

Did you sleep here last night? The impact of the household definition in sample surveys: a Tanzanian case study • Tiziana Leone, London School of Economics and Political Science (LSE) ; Ernestina E. Coast, London School of Economics and Political Science (LSE) ; Sara Randall, University College London

Is there a trade-off between time-efforts in contact procedure and data quality? Empirical study based on contact files in ESS Round 4 • Hideko Matsuo, Katholieke Universiteit Leuven ; Jaak Billiet, Katholieke Universiteit Leuven