1. Operationalizing Trapped Populations • Jack DeWaard , University of Minnesota, Twin Cities; Mason Mathews, University of Colorado Boulder; Fernando Riosmena, University of Colorado Boulder; Daniel Simon, University of Colorado Boulder; Lori M. Hunter, University of Colorado Boulder.

2. Using the Population Register as a Sampling Frame for Surveying Emigrant Populations: Introducing the German Emigration and Remigration Panel Study (GERPS) • Andreas Ette, Federal Institute for Population Research (BiB); Nils Witte, Federal Institute for Population Research (BiB); Jean Guedes Auditor, Federal Institute for Population Research (BiB); Nikola Sander , Federal Institute for Population Research (BiB); Norbert F. Schneider, Federal Institute for Population Research (BiB); Jean Philippe Pierre Décieux, University of Duisburg-Essen; Marcel Erlinghagen, University of Duisburg-Essen.

3. Using Multiple Modes of Data Collection to Recruit Migrant Samples With Network Sampling With Memory: The Chinese Immigrants in Raleigh-Durham (ChIRDU) Study • Giovanna Merli , Duke University; Theodore Mouw, University of North Carolina at Chapel Hill; Allison Stolte, Duke University; Claire Le Barbenchon, Duke University; Francesca Florey-Eischen, Duke University.

4. Creating a New Nationally Representative Sample of Immigrants to the United States: Design and Results From the 2017 PSID New Immigrant Refresher • Narayan Sastry , University of Michigan.