Abstract #300312

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JSM 2003 Abstract #300312
Activity Number: 438
Type: Topic Contributed
Date/Time: Thursday, August 7, 2003 : 8:30 AM to 10:20 AM
Sponsor: Section on Government Statistics
Abstract - #300312
Title: BTS Prototype Disclosure Limitation Software for Complex Tabular Data
Author(s): J. Neil Russell*+ and James Kelly
Companies: Bureau of Transportation Statistics and OptTek Systems, Inc.
Address: U.S. Department of Transportation, Washington, DC, 20590-0001,
Keywords: disclosure limitation ; complex tabular data ; prototype software ; tabu search ; BTS
Abstract:

The United States Department of Transportation's Bureau of Transportation Statistics (BTS) has to protect individually identifiable information by law. Because the field of statistical disclosure limitation (SDL) research is still evolving, BTS initiated a project to develop, demonstrate, and implement new, state-of-the-art SDL methods for complex, multidimensional (up to five) tables that contain a hierarchical structure. After reviewing a wide variety of SDL methods described in the literature, the project team selected the Synthetic Data Substitution (SDS) method proposed by Dandekar and Cox (2002), which evaluated well for the BTS requirements. A modified version of this SDS method was implemented into prototype computer software for demonstration and testing. The explication of extremely efficient algorithms (capable of processing multidimensional tables with hundreds of thousands of entries) will be discussed, along with software functionality and examples of agency tabular data processed in the prototype software.

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