Re-release; distribution Files Reformatted

Re-release; distribution Files Reformatted

1993 AHEAD (Final, Version 2.10)

02/04/2003

The 1993 distribution files have been re-released as .zip files instead of .exe files.

The data files have been re-released in our standard format -- ASCII data (.DA) files and associated program statement files for SAS, SPSS and Stata users. This will facilitate usage by analysts using SPSS and Stata as formerly the 1993 data files were available only as SAS internal and SAS transport files. In addition:

• Identification variables are provided in character (string), instead of numeric, format to facilitate merging with data of later years.
• Missing data statements are included.

The contents of most of the documentation files have not changed. The codebook documentation and questionnaire are now distributed only in Adobe .PDF format.

You'll typically want to download the ASCII data files, and one set of program statement files, and questionnaire and documentation (codebook) files. See the revised Readme and Changes documents for further details.