DEMOGRAPHIC RESEARCH VOLUME 38, ARTICLE 44, PAGES 1339,1358 PUBLISHED 17 APRIL 2018 http://www.demographic-research.org/Volumes/Vol38/44/ DOI: 10.4054/DemRes.2018.38.44 Research Article Measuring extended families over time in informal settlements in Nairobi, Kenya: Retention and data consistency in a two-round survey Sangeetha Madhavan Donatien Beguy Shelley Clark This publication is part of the Special Collection on “Children and Family Dynamics in sub-Saharan Africa,” organized by Guest Editors Olivia Samuel and Véronique Hertrich. © 2018 Sangeetha Madhavan, Donatien Beguy & Shelley Clark. This open-access work is published under the terms of the Creative Commons Attribution 3.0 Germany (CC BY 3.0 DE), which permits use, reproduction, and distribution in any medium, provided the original author(s) and source are given credit. See https://creativecommons.org/licenses/by/3.0/de/legalcode.