1 CHAPTER 23: Network-Based Methods for Accessing Hard-to-Reach Populations Using Standard Surveys

Standard surveys often exclude members of certain groups, known as hard-to-reach groups. One reason these individuals are excluded is difficulty accessing group members. Persons who are homeless are very unlikely to be reached by a survey that uses random-digit dialing, for example. Other individuals can be accessed using standard survey techniques, but are excluded because of issues in reporting. Members o