Designing Surveys of International Migrants: The Needle in the Haystack, or Finding the Right Haystack? A Case Study of Colombians in Ecuador • Richard Bilsborrow, University of North Carolina at Chapel Hill

Contextual Factors Influencing Sexual Activity within Adolescent Social Networks in a Micropolitan/Rural Area • Deladem Kusi-Appouh, Cornell University

Assessment and Validation of Respondent Driven Sampling • Jing Li, University of Wisconsin at Madison ; Giovanna Merli, University of Wisconsin at Madison ; Erik Nordheim, University of Wisconsin at Madison ; William Whipple Neely, University of Wisconsin at Madison

Surveying Migrant Households: A Comparison of Census-Based, Snowball, and Intercept Surveys • David McKenzie, World Bank Group ; Johan Mistiaen, World Bank Group