A listing of the program is available from the author at Northwestern University. (MB)

The ACE Data Base is compared to others. Devises for maintenance of confidentiality in data collection, transmission, and analysis are evaluated, as well as administrative and ethical regulations, and computer processing. Recommendations follow. (Author/DB)

This report examines a series of general models that represent the process of merging records from separate files when it becomes essential to inhibit identifiability of records in at least one of the files. Models are illustrated symbolically by flow diagrams, and examples of each variation are taken from the social sciences. These variations…

The purpose of this article is to describe a system for protecting the anonymity of subjects in longitudinal research and for maintaining the security of data files. The basic system comes from the American Council on Education Cooperative Institutional Research Program. Data is collected from questionnaires, and converted to magnetic tape.…