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Important Note: This list of changes is provided for historical purposes only. Site modifications may have been superseded, publications updated, links rendered inactive, and navigation paths altered or deleted.

1999 Change Log

Dec 22, 1999:
- Announcements updated with news about AHEAD 1995
- AHEAD 1995 Public Release data put online through the Data Center
- What's Available page updated with information about the AHEAD 1995 public release.
- Codebooks page updated with link to AHEAD 1995 codebook.
- Data Alerts page updated with four new entries for AHEAD 1995.
- Announcements block on main page rearranged.

Dec 10, 1999:
- HTML codebooks added to Codebooks page

Dec 6, 1999:
- Usage statistics updated.
- Main page updated.

Nov 15, 1999:
- Direct link to codebooks added, linked from Data Center page.
- Other Sites of Interest updated.
- Announcements updated.

Nov 10, 1999:
- Job postings updated.
- Usage statistics updated.

Oct 6, 1999:
- The webmaster for the HRS/AHEAD Web Page is now Larry Kestenbaum (polygon@isr.umich.edu).
- What's Available, under Data and Documentation/ Data Center, has been updated to reflect progress on the AHEAD Wave 2 Public Release.
- Usage statistics updated.

Sep 2, 1999:
- Data Alert added for AHEAD Wave 2 Preliminary Release: "Supplemental File Available: Exit Proxy - Other Persons". Data Alerts can be found under Data and Documentation/ Data Center/ Data Alerts.

Sep 21, 1999:
- A "Pension Present Value Database", contributed by researchers Bob Peticolas and Tom Steinmeier, is now available for download under Data and Documentation/ Data Center/ Researcher Contributions.

Sep 2, 1999:
- Data Alert added for AHEAD Wave 2 Preliminary Release: "Supplemental File Available: Exit Proxy - Other Persons". Data Alerts can be found under Data and Documentation/ Data Center/ Data Alerts.

Aug 26, 1999:
- Data Alert added for the HRS 1998 Preliminary Release: "Preliminary Net Worth Imputations Available". HRS/AHEAD Data Alerts are found under Data and Documentation/ Data Center/ Data Alerts.
- Data Alert added for the HRS 1996 Preliminary Release: "New Version of HRS Wave 3 Preliminary Available". HRS/AHEAD Data Alerts are found under Data and Documentation/ Data Center/ Data Alerts.

Aug 13, 1999:
- Search engine data updated.
- Site map updated.
- "Sample Sizes and Response Rates" page added under Study Details/ Technical Details.
- "Missing Data Imputations" page added under Study Details/ Technical Details.
- "Study Details" page replaced (under Study Details off the main page).
- "Study Development" link added under Study Details off the main page.
- "Survey History and Design" added under Study Development.
- "Added Cohorts and Movement to Steady State" added under Study Development.
- "Relationship to Other Studies on Aging" added under Study Development.

Aug 10, 1999:
- Data Alert added for the HRS 1998 Preliminary Release: "Important: New Version of DATAFIX1.ZIP Available". HRS/AHEAD Data Alerts are found under Data and Documentation/ Data Center/ Data Alerts.

Aug 6, 1999:
- Data Alert added for the HRS 1998 Preliminary Release: "Truncation Problem: Correction Statements Available (DATAFIX1.ZIP)". HRS/AHEAD Data Alerts are found under Data and Documentation/ Data Center/ Data Alerts.

Aug 4, 1999:
- Usage statistics updated.

Jul 29, 1999:
- Data Alert added for the HRS 1998 Preliminary Release: "New Version of Preliminary Weights Available". This and other data alerts can be found under Data and Documentation/ Data Center/ Data Alerts.
- Description of experimental modules for HRS Waves 1-3 and AHEAD Waves 1-2 added under Study Details/ Survey Content/ Modules.
- User note added under Data and Documentation/ Data Center/ Concordance: "The HRS/AHEAD Concordance is still in preliminary form. You will find that in some instances information in the concordance does not match information in released datasets. For this reason, after using the concordance, please refer to the appropriate codebooks and questionnaires to confirm the presence and location of variables in the data."
- Dynamic Bibliography link provided under "Papers and Publications"/ "Bibliography".
- Co-Investigator listing updated under "Overview"/"Co-PIs, Committees".
- "Staff, Committees" (under Overview on main page) renamed to "Co-PIs, Committees"
- Research staff listings removed under "Overview"/"Staff, Committees".
- Site map updated.

Jul 16, 1999:
- HRS Overview and AHEAD Overview (under "Overview", off of main page) updated.

Jul 15, 1999:
- Three Data Alerts added for the HRS 1998 Preliminary Release: "Preliminary Weights Available for HRS 1998", "Frequencies and Means Available for HRS 1998 Preliminary", and "Truncated Variable Width in Q699, Q703". These and other data alerts can be found on this web page under Data and Documentation/ Data Center/ Data Alerts.
- As part of the HRS Wave 1 data collection an effort was made to collect pension plan information from respondents' employers. In coordination with HRS, Bob Peticolas has created a special public use file based on this data for those HRS respondents whose pension plans were successfully collected. This data file is now available for download under Data and Documentation/ Data Center/ Researcher Contributions.

Jun 30, 1999:
- Announcement added: "HRS 1998 Preliminary Release is Now Available".
- HRS 1998 Preliminary Release availability noted under Data and Documentation/ Data Center/ Preliminary Release Datasets and Files.
- "What's Available", under Data and Documentation/ Data Center, has been updated to reflect progress on the AHEAD Wave 2 Partial Public Release. Due to unexpected difficulties in processing the HRS 1998 Preliminary Release, we are now forecasting that the AHEAD Wave 2 Partial Public Release will not be available until late August or September.

Jun 28, 1999:
- The HRS 1998 Questionnaire is now available for either downloading or viewing online under Data and Documentation/ Data Center/ Questionnaires. (Note: Section D [Family Structure, Transfers] is not yet available, but will be soon)

Jun 2, 1999:
- "What's Available", under Data and Documentation/ Data Center, has been updated to reflect progress on the AHEAD Wave 2 Partial Public Release. (The AHEAD Wave 2 Partial Public Release will not be available before July 1999 due to delays in processing the HRS1998 Preliminary Release. We apologize for the inconvenience.)

May 26, 1999:
- Questionnaires for HRS Wave 1 [1992], AHEAD Wave 1 [1993], and HRS Wave 2 [1994] have now been set up for viewing "online" under Data and Documentation/ Data Center/ Questionnaires/ "view questionnaires online". The questionnaires are presented in a single table, broken down by content area, in a concordance-type format.
- Adobe PDF versions of HRS Wave 1 [1992] and HRS Wave 2 [1993] questionnaires are now available for download under Data and Documentation/ Data Center/ Questionnaires/ "download questionnaires".

May 26, 1999:
- Links for the University of Michigan's Population Studies Center updated under "Other Sites of Interest" (off of main page).
- Dead links under "Other Sites of Interest" changed or removed.

May 17, 1999:
- Two job postings removed under Announcements/ Employment Opportunities.

May 7, 1999:
- "How to Use this Site", located off of the main web page, has been updated.
- "What's Available", under Data and Documentation/ Data Center, has been updated to reflect progress on the AHEAD Wave 2 Partial Public Release.
- Search engine updated.

May 3, 1999:
- Notice: Users of HRS restricted Social Security data may now use Version 1.0 of the HRS/AHEAD Tracker File in conjunction with any currently distributed Social Security restricted dataset. While written permission from HRS is not necessary for use of this file with HRS restricted data, restricted data users are reminded that HRS must be informed of any data files (such as the HRS/AHEAD Tracker File) used in conjunction with HRS restricted data. This can be done by sending email to "catlieb@isr.umich.edu".
- Usage statistics updated.

Apr 16, 1999:
- Data Alert added for AHEAD Wave 2 Preliminary Release: "New Variables Available: Preloaded Asset Breakpoints". Data Alerts can be found under Data and Documentation/ Data Center/ Data Alerts.

Mar 30, 1999:
- Announcement added: "HRS Wave 3 Partial Public Release is Now Available".
- The HRS Wave 3 Partial Public Release has been made available under Data and Documentation/ Data Center/ Public Release Datasets and Files/ (register)/ HRS Wave 3.
- "What's Available", under Data and Documentation/ Data Center, has been updated to reflect progress on the HRS Wave 3 and AHEAD Wave 2 partial public releases.

Mar 29, 1999:
- "What's Available", under Data and Documentation/ Data Center, has been updated to reflect progress on the HRS Wave 3 partial public release.

Mar 19, 1999:
- "What's Available", under Data and Documentation/ Data Center, has been updated to reflect progress on the HRS Wave 3 partial public release.
- Usage statistics updated.

Mar 12, 1999:
- A new version of the HRS Wave 3 Preliminary Release is available. It can be obtained from the same FTP site as other preliminary release files. Please send electronic mail to HRS Questions with any questions or comments you might have.
- Data Alerts added: "Important Note about ID Variable Storage Formats" and "New Version (2.00/"Beta") Available", under Data Center/ Data Alerts/ HRS Wave 3 Preliminary Release.

Mar 8, 1999:
- Two new supplemental files are available for the AHEAD Wave 2 Preliminary Release; they may be obtained from the same location as other AHEAD Wave 2 Preliminary Release files. The first, "DOP10.EXE", is a supplement to the core dataset, and contains information on children and household members. The second, "DXHELP.EXE", is a supplement to the exit proxy dataset, and contains information on helpers.
- Data Alert added for AHEAD Wave 2 Preliminary Release (under Data Center/ Data Alerts): "Child/Household Member and Exit Helpers Supplemental Files Available".

Mar 5, 1999:
- "What's Available", under Data and Documentation/ Data Center, has been updated to reflect progress on the HRS Wave 3 partial public release.

Feb 22, 1999:
- Number of registrations, under Usage Statistics, was updated.

Feb 18, 1999:
- Site Map updated.
- The "Datasets and Files" section has been reorganized into a single "Data Center" that should be more convenient for users.
- "What's Available", under Data and Documentation/ Data Center, has been updated.
- Search engine updated.

Feb 15, 1999:
- Announcement added: "Older Adults, Health Information, and the World Wide Web".
- Announcement added: "NACDA: National Survey of Self-Care and Aging: Follow-Up, 1994".
- Announcement added: "NIA Pilot Research Grant Program".
- Usage statistics and search engine updated.

Jan 22, 1999:
- File added under Researcher Contributions: "Self-Reported Pension Wealth" (HRS Wave 1). HRS/AHEAD Researcher Contributions can be found under Datasets and Files/ Download Files/ (register)/ Researcher Contributions.
- Announcement added: "Important HRS Wave 3 Preliminary Corrections".
- Errata added for the HRS Wave 3 [1996] Preliminary Release: "RESPID Problems and Duplicate Cases". HRS Wave 3 Errata is found under Datasets and Files/ Download Files/ (register)/ Preliminary Release Datasets and Files/ HRS Wave 3 [1996] Errata.

Jan 21, 1999:
- Job posting added: "Administrative Associate I/Administrative Assistant II".
- Job posting removed: "Research Assistant II/I: Data Cleaning Specialist."

Jan 15, 1999:
- Notice added under Datasets and Files: "Users of HRS restricted Social Security data may not utilize the HRS/AHEAD Tracker File in conjunction with any Social Security restricted dataset without written permission from HRS/AHEAD."

Jan 13, 1999:
- Announcement added: "HRS/AHEAD Servers Are Back Up".

Jan 12, 1999:
- Announcement added: "HRS/AHEAD Servers Are Down".
- Job Posting Removed: Research Assistant II/I: Data Processor.

[Change Log: Current]
[Change Log: 2007]
[Change Log: 2006]
[Change Log: 2005]
[Change Log: 2004]
[Change Log: 2003]
[Change Log: 2002]
[Change Log: 2001]
[Change Log: 2000]
[Change Log: 1998]
[Change Log: 1997]
[Change Log: 1996]
[Change Log: 1995]

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