Surveys typically use a list of landline telephone numbers and/or addresses as the frame from which the sample will be drawn. Certain population segments (e.g. migrant workers) may be underrepresented if their members disproportionately lack a landline phone or stable/documented address. (The increased use of cellular phones has presented general challenges and issues for survey research.)19 Federal household surveys typically select their samples by first selecting a sample of geographic areas, then households within those areas, and finally individuals within those households. Target populations that are geographically segregated, such as remote rural communities or neighborhoods where an Asian subpopulation may be concentrated,20 they may be underrepresented in the sample if their geographic area is not selected.