Dec12.zip

Methodological Notes - Sampling Design: - Includes cell-only households and dual-users (cell + landline). - Cell phone interviews conducted via RDD sampling. - Weighting Variables: - WEIGHT: Used for full sample analysis (landline + cell). - LLWEIGHT: For landline-only analysis; excludes cell interviews. - COWEIGHT: For landline + cell-only analysis; excludes dual-users. - Geographic Data Handling: - Post-2008, geographic variables (region, state, county) derived from self-reported ZIP codes due to high error rates in sample metadata. - Original sample-based geographic variables retained (prefixed with “s”) for archival purposes only. - Privacy Measures: - ZIP codes, county identifiers, and phone numbers removed to protect respondent anonymity.