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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 Site modifications may have been superseded, publications updated, links rendered inactive, and navigation paths altered or deleted.

1998 Change Log

Dec 21, 1998:
- A new version of HRS Wave 1 (Version 1.01) is available under Datasets and Files/ Download Files/ (register)/ Public Release Datasets and Files/ HRS Wave 1. The new version is exactly the same as the last one, except that identification variables HHID, ASUBHH, PN, and HHIDPN have been added to key files to make merging with other datasets easier.

Dec 20, 1998:
- Two Announcements Added: "New HRS/AHEAD Tracker File Available" and "HRS/AHEAD Availability Over the Holiday Season".
- A new HRS/AHEAD Tracker File (Version 1.0) is available under Download/ (register)/ Public Release Datasets and Files/ "HRS/AHEAD Tracker File". The files now contains information on HRS Wave 1 [1992/1993], AHEAD Wave 1 [1993/1994], HRS Wave 2 [1994/1995], AHEAD Wave 2 [1995/1996], and the National Death Index up to AHEAD Wave 2 [1995/1996].

Dec 08, 1998:
- The documentation section "Survey Design" has been completed (under "Study Details", off of the main page). Included there is information on the sample design, which respondents answered which types of questions, and other important study details.

Dec 07, 1998:
- Errata added for the AHEAD Wave 2 [1995] Preliminary Release: "ID_XPORT.EXE and EX_XPORT.EXE Not SAS XPORT Files". AHEAD Wave 2 Errata is found under Datasets and Files/ Download Files/ (register)/ Preliminary Release Datasets and Files/ AHEAD Wave 2 [1995] Errata.

Nov 24, 1998:
- Errata added for HRS Wave 1 [1992] and HRS Wave 2 [1994] Public Release Files: "Problematic Age Variable (V46)" and "Problematic Age Variable (W103)", respectively. Public release errata may be found under Datasets and Files/ Download Files/ (register)/ Public Release Datasets and Files.
- Announcement added: "NACDA Release: Second Supplement on Aging".
- Usage Statistics (accesses and cumulative accesses) updated.
- Errata added for the HRS Wave 3 [1996] Preliminary Release: "Decompressing W3ALPHA.EXE: Duplicate File Names Within". HRS Wave 3 Errata is found under Datasets and Files/ Download Files/ (register)/ Preliminary Release Datasets and Files/ HRS Wave 3 [1996] Errata.

Nov 23, 1998:
- Two job postings added under "Employment Opportunities" (under Announcements on main page). Both postings are for a "Research Assistant II/I: Data Processor".

Nov 19, 1998:
- A new version (1.10) of the HRS Wave 1 [1992] Questionnaire is now available. File "HRS_PROD.N" in version 1.00 of the questionnaire was actually from HRS Wave 2 [1994], not HRS Wave 1 [1992]. The error has been corrected in the new version. The new HRS Wave 1 Questionnaire can be obtained in two places: under Datasets and Files/ Questionnaires, and also under Datasets and Files/ Download Files/ (register)/ Public Release Datasets and Files/ HRS Wave 1 [1992].
- Errata added for HRS Wave 1 Public Release: "Questionnaire Version 1.00: Section N". HRS Wave 1 Errata is found under Datasets and Files/ Download Files/ (register)/ Public Release Datasets and Files/ HRS Wave 1 Errata.

Nov 17, 1998:
- Errata added for HRS Wave 3 Preliminary Release: "Data descriptors: Q1645A1B in Section D". HRS Wave 3 Errata is found under Datasets and Files/ Download Files/ (register)/ Preliminary Release Datasets and Files/ HRS Wave 3 Errata.
- Errata added for AHEAD Wave 1 Public Release: "Missing Documentation: EXAMTXT.ZIP". AHEAD Wave 1 Errata is found under Datasets and Files/ Download Files/ (register)/ Public Release Datasets and Files/ AHEAD Wave 1 Errata.

Nov 04, 1998:
- Dynamic Bibliography link added under Papers and Publications/ Bibliography/ Dynamic Bibliography. The Dynamic Bibliography is a web-based interface for the HRS/AHEAD Bibliography. While it is already very functional, the interface is still under development, so please send us any comments and suggestions you have via electronic mail to HRS Questions (hrsquest@isr.umich.edu). Thank you!

Nov 3, 1998:
- A new, significantly improved AHEAD Wave 1 Questionnaire (Version 3.00) is now available for download in both Adobe PDF and Microsoft Word formats. To obtain the questionnaire, go to either Datasets and Files/ Questionnaires or Datasets and Files/ Download Files/ (register)/ Public Release Datasets and Files/AHEAD Wave 1.

Oct 30, 1998:
- Dynamic Concordance link added to front page under Datasets and Files. The Dynamic Concordance is a web-based interface for the HRS/AHEAD Concordance. While it is already very functional, both the interface and the concordance database behind it are still under development, so please send us any comments and suggestions you have via electronic mail to HRS Questions (hrsquest@isr.umich.edu). Thank you!

Oct 21, 1998:
- Errata added for AHEAD Wave 2 Preliminary Release: "AHEAD Wave 2 Helper File Supplement is Now Available". AHEAD Wave 2 Errata is found under Datasets and Files/ Download Files/ (register)/ Preliminary Release Datasets and Files/ AHEAD Wave 2 Errata.

Oct 19, 1998:
- Change made to "AHEAD Wave 2 ID Changes and Corrections" under Datasets and Files/ Download Files/ (register)/ Preliminary Release Datasets/ AHEAD Wave 2/ Errata. The CaseID for one of the instructions was previously incorrect; the correction is dated and in boldface.

Oct 14, 1998:
- Job postings for Research Associate II (Data Analysis Coordinator) and Senior Data Archive Specialist (Documentation Coordinator) removed.

Oct 12, 1998:
- HRS Wave 2 Errata updated: "Duplicate Person Numbers in W2KIDS.DA" The HRS Wave 2 Errata listings can be found under Datasets and Files/ Download Files/ (register)/ Public Release Datasets and Files/ HRS Wave 2 [1994] Errata.

Sep 28, 1998:
- Announcement added: "NIA Centers on the Demography of Aging P30 RFA".

Aug 25, 1998:
- Three pieces of HRS Wave 2 errata added (under Datasets and Files/ Download Files/ (register)/ Public Release Datasets and Files/ HRS Wave 2 Errata): "W3617 (FA44): Values Outside of Range", "Duplicate Person Numbers in W2KIDS.DA", and "User Warning: HRS Wave 2 Income Imputation Data".

Aug 24, 1998:
- Announcement added: "User Warning: HRS Wave 2 Income Imputation Data".

Aug 21, 1998:
- Descriptions of the Microdata Advisory Committee and the HRS/AHEAD Data Confidentiality Committee added under Overview/ Staff and Committees.

Aug 18, 1998:
- Announcement added: "NIH Program Announcement: SES and Health across the Life Course".

Aug 17, 1998:
- Job posting added under "Employment Opportunities" (under Announcements on main page): "Senior Data Archives Specialist: Documentation Coordinator".

Aug 13, 1998:
- Three Announcements added: "NIA Aging Research Career Workshop", "Economics of Aging at GSA Meetings", and "Societal Impact on the Aging Self Conference".
- "AHEAD Overview" and "HRS Overview" updated (under Overview category on main page).

Jul 21, 1998:
- "Known Deaths Between HRS Wave 2 and HRS Wave 3" document added under Datasets and Files/(register)/Preliminary Release Datasets/HRS Wave 3 Preliminary Release Errata.

Jul 16, 1998:
- Welcome letter (from Robert Willis, principal investigator for HRS/AHEAD) added under Overview.

Jul 1, 1998:
- "ID Changes and Corrections" added under Errata for both the AHEAD Wave 2 [1995] and HRS Wave 3 [1996] Preliminary Releases. (Go to Download Files/ (register)/ Preliminary Release Data/ AHEAD Wave 2 or HRS Wave 3 Errata.)

Jun 29, 1998:
- Job posting added under "Employment Opportunities" (under Announcements on main page): "Research Assistant II: Data Cleaning Specialist".
- The public FTP server was put back online sometime over the weekend, allowing users to download data again.

Jun 26, 1998:
- Announcement added: "Public FTP Server Down, Back Up Soon".

Jun 25, 1998:
- New versions of SAS.EXE, SPSS.EXE, STATA.EXE, and HRS2.EXE are available for the HRS Wave 2 Full Public Release, under Datasets and Files/ Download Files/ (register)/ Public Release Datasets and Files/ HRS Wave 2.
- Error noted under HRS Wave 2 Full Public Release Errata (under Datasets and Files/ Download Files/ (register)/ Public Release Datasets and Files/ HRS Wave 2 Errata): "Fix for Section B and Section S SAS/SPSS/STATA statements".

Jun 22, 1998:
- Renamed "Datasets and Files" link on the main page (under the category of the same name) to "Download Files".

Jun 18, 1998:
- Announcement added: "HRS Wave 2 Full Public Release Available".
- The HRS Wave 2 Full Public Release is now available via Datasets and Files/ (register)/ Public Release Datasets and Files/ HRS Wave 2 Public Release.
- "What's Available", under Datasets and Files on the main page, has been updated.
- References to HRS Wave 2 Preliminary Release removed from web site.
- HRS Wave 2 Preliminary Release data removed from private FTP site.

Jun 17, 1998:
- Data Analysis Coordinator (Research Associate II) job added under "Job Postings".
- A "Job Postings" section was added under "Announcements". It will contain notices of positions available on HRS/AHEAD.
- Usage statistics and search engine updated.

Jun 12, 1998:
- "Staff, Committees", under Overview, has been updated.

Jun 1, 1998:
- File "CONCORD.BAT", a utility to aid in decompression of the HRS/AHEAD Concordance files, had not been downloading appropriately in its prior format. To fix the problem, it has been re-released in self-decompressing file "CONCORD.EXE", under Datasets and Files/ (register)/ Public Release Datasets and Files/ Concordance. If you are using the HRS/AHEAD concordance and require "CONCORD.BAT", you will want to download the new file.

May 27, 1998:
- A respondent-level, longitudinal tracker file for HRS is now available under Datasets and Files/ (register)/ Public Release Datasets and Files/ HRS Tracker File. The tracker file currently contains information on both HRS Wave 1 and HRS Wave 2. All analysts working with the HRS should obtain this file. Identification, cohort, year of first interview, weight, deceased status, response status, proxy, mode, and basic demographic variables for both waves are present in the file.

May 22, 1998:
- A Beta version of the HRS/AHEAD concordance is now available for public download under Datasets and Files/ (register)/ Public Release Datasets and Files/ Concordance. It includes question cross-references for HRS Waves 1-3 and AHEAD Waves 1-2.
- New citations have been added to the HRS/AHEAD Working Paper Series under Papers and Publications/ Bibliography/ Working Paper Series.

May 20, 1998:
- More than 30 new citations have been added to the HRS/AHEAD Bibliography under Papers and Publications/ Bibliography/ Bibliography.

May 07, 1998:
- The household listing and all Section E files for the HRS Wave 2 Partial Release are now available under Datasets and Files/ (register)/ Public Release Datasets and Files/ HRS Wave 2 Public Release/ W2PART13.EXE. The Section E files include a new version of the children and sibling files, a parents file, and a file that contains the remaining Section E variables.
- HRS Wave 2 progress report updated under What's Available/ HRS Wave 2 [1994].

May 01, 1998:
- Announcement added: "Updated AHEAD 2 Preliminary Release Available".

Apr 23, 1998:
- Announcement added: "Retirement Research Consortium (RRC) Project".

Apr 20, 1998:
- The Children and Sibling portions of Section E have been added to the HRS Wave 2 Partial Public Release, under Datasets and Files/ (register)/ Public Release Datasets and Files/ HRS Wave 2 Public Release/ W2PART12.EXE.
- HRS Wave 2 progress report updated under What's Available/ HRS Wave 2 [1994].

Apr 18, 1998:
- Section N (Income) has been imputed and added to the HRS Wave 2 Partial Public Release, under Datasets and Files/ (register)/ Public Release Datasets and Files/ HRS Wave 2 Public Release/ W2PART11.EXE.
- HRS Wave 2 progress report updated under What's Available/ HRS Wave 2 [1994].
- Announcement added: "RAND Summer Institute and Mini Med School".

Apr 16, 1998:
- "What's Available" (off of main page underneath Datasets and Files) edited to reflect the start and end of field periods, and to update projected completion dates.
- HRS Wave 2 progress report updated under What's Available/ HRS Wave 2 [1994].

Apr 10, 1998:
- A new version of the "Imputed Medical Expenditures" file by Dan Hill is now available under Datasets and Files/ (register)/ Researcher Contributions.

Apr 03, 1998:
- Sections C (Cognition) and V (Capital Gains) added to the HRS Wave 2 Partial Public Release, under Datasets and Files/ (register)/ Public Release Datasets and Files/ HRS Wave 2 Public Release/ W2PART10.EXE.
- HRS Wave 2 progress report updated under What's Available/ HRS Wave 2 [1994].

Mar 23, 1998:
- Announcement added: "Secondary Analysis in Demography and Economics of Aging: R03 Program".

Mar 20, 1998:
- New SAS transport files have been provided for the AHEAD Wave 1 Public Release under Datasets and Files/ (register)/ Public Release Datasets and Files/ AHEAD Wave 1 [1993]/ DATA211.EXE. Two of the SAS transport datasets had errors in them, but are now corrected. The errors were in the file format, not the data itself. Users need not obtain the new file unless they use the SAS transport datasets; the regular SAS system files are fine.

Mar 18, 1998:
- Announcement added: "Complete AHEAD Wave I Public Release Now Available".
- ASCII text documentation is now available for the AHEAD Wave 1 Public Release, Version 2.10, under Datasets and Files/ (register)/ Public Release Datasets and Files/ AHEAD Wave 1 [1993].
- Announcement added: "Call for Proposals (PWBA, DOL)".

Mar 17, 1998:
- Version 2.10 of the AHEAD Wave 1 Public Release is now available via Datasets and Files/ (register)/ Public Release Datasets and Files/ AHEAD Wave 1 [1993]. As of this version the helper file has been added, so all AHEAD Wave 1 Public Release data is now available. Many inconsistencies in helper information, both across and within datasets, were checked into and corrected.
- Fixed error which prevented search engine (under Search the Site) from functioning appropriately.

Mar 09, 1998:
- Announcement added: "PAA Sessions on the Demography of Aging".
- Announcement added: "NACDA 1998 Summer Workshop".
- Added preliminary version of AHEAD 2 Questionnaire under "Datasets and Files"/ "Questionnaires".

Mar 07, 1998:
- Section F (employment) for the HRS Wave 2 Public Release is now available under Datasets and Files/ (register)/ Public Release Datasets and Files/ HRS Wave 2 [1994], in file "W2PART9.EXE".
- HRS Wave 2 progress report updated under What's Available/ HRS Wave 2 [1994].

Feb 02, 1998:
- HRS/AHEAD Web Page reorganized. Visitors will find that many improvements have been made (they are too numerous to list here). Please e-mail the webmaster if you notice any problems or have suggestions.
- Search engine updated.

Feb 01, 1998:
- "HRS Wave 3 [1996] Respondent Report" added to Overview.
- "HRS/AHEAD Sections Cross-Reference" added to Study Details/ Survey Content.

Jan 31, 1998:
- A new version of the AHEAD Wave 1 [1993] Questionnaire is now available for download via the "Data and Files" section.
- Announcement added: "New AHEAD Wave 2 [1995] Preliminary Release Available".

Jan 30, 1998:
- HRS/AHEAD Web Page reorganized. Visitors will find that many improvements have been made (they are too numerous to list here).
- Announcement added: "IFEBP Grants for Research Program".

Jan 29, 1998:
- Four links added to Other Sites of Interest: "Pension Research Council at the Wharton School, University of Pennsylvania", "Centers for Disease Control and Prevention (CDC)", "National Bureau of Economic Research (NBER)", and "The World Bank Group".

Jan 26, 1998:
- Announcement added: "NIA R03 Program Announcements Follow-up".

Jan 22, 1998:
- HRS Wave 2 Progress Report updated.

Jan 21, 1998:
- Announcement added: "NIA Pilot Research Grant Program".

Jan 05, 1998:
- Data Release Information (in the header of the main page) has been updated.

[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: 1999]
[Change Log: 1997]
[Change Log: 1996]
[Change Log: 1995]

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