AHEAD 1995 Imputation Release (Version 2.0)

August 08, 2002

The AHEAD Imputation Final Core Data Release (Version 2.0) is now available. Based on the 1995 AHEAD Final Core data (version 2.0), this release supersedes the previous release (Version 1.0, July 2000) of this data.

Compared to the previous version, this release used a slightly modified imputation program that is more consistent with one used for the imputations in other HRS/AHEAD waves. More importantly, corrections were made to Section E (Medical Expenditure) data, which had been contaminated by some programming errors in Version 1.

Please note that despite the fact that the most extreme outliers were excluded from the imputation process used to fill missing data, they remain in the reported data. Users may wish to review distributions and consider the use of robust statistical procedures to minimize the impact of any outliers on their analyses.

If you find any problems with the data, please report to us by email at our help desk address, hrsquestions@umich.edu.