1. Preservation and Security IPUMS International Wendy Thomas Data Archivist

2. Processing Data ► Data is received  ASCII format or similar on CD/DVD  9 track tape any format ► Conversion process and tape reading by  Muller Media  Signed confidentiality agreement, retain NO FILES ► Data is converted to ASCII format

3. Internal Processing ► Data is encrypted  Only high level staff have the encryption code  Sensitive and geographically specific information is removed  Creation of a secure, non-identifiable file ► Data processing  Evaluation of data elements  Creation of harmonized variables  Graduate student staff work only with non-identifiable data sets ► Creation of the IPUMS sample

4. Storage ► Off line files  CD/DVD copies are held in a data safe ► Preservation from fire ► Preservation from access (PI’s and Data Archivest only) ► Internally accessible  Encrypted files (high level staff only)  Non-identifiable source files ► Externally available  Public use samples in IPUMS format  Registered users only  Respect limitations imposed by countries

5. Documentation Coverage ► Date from 1920 to 2006 ► Documentation from over 400 censuses ► Promotional material to official forms ► Prepared over 30 country specific listings of documents in the archive ► Over 20,000 documents total

6. Document Preservation ► Collection is housed in acid free archive quality storage boxes ► Bibliographic records are created for all documents including a first page scan for easier identification of useful information ► Full scans are made of all enumeration instructions, codebooks, and coding manuals for data in IPUMS ► Full scans are made of all materials from the US Census Bureau

7. Document Availability ► Enumeration Forms  Publicly available regardless of data availability ► Enumerator Instructions/Codebooks etc.  Available per country agreements for data accessibility ► Related documentation  On-line versions will be available for those that we have agreements for or are public documents  All others will be listed in an on-line catalog of the Minnesota Population Center holdings

8. Services for Countries ► Provide a listing of material held with first page scan ► Can provide full scans of any document held in the collection ► Contact:  Wendy Thomas, MPC Data Archivist  wlt@pop.umn.edu