Restricted-access data
Data such as geocodes that could potentially be used to identify individual respondents are excluded from the general-release NAES08-Phone datasets. These data are restricted to those conducting scientific and public policy research, and are available only by completing an application (PDF).
The following variables have restricted-access data:
WFc03
Area code
WFc04
Metropolitan statistical area (*)
WFc05
County (*)
WFc06
ZIP code (**)
WFc07
Congressional district (*)
WFc08
Broadcast media market (Nielsen categories) (*)
WFc09
Radio media market (Arbitron categories) (*)
WB03$
Line of work — verbatim answer for "other" in variable WB03
WB06
Name of labor union(s) household belongs to (follow-up to variable WB05)
* Imputed from telephone number
** Two ZIP codes are available: one imputed from phone number, one provided by the respondent.