Photograph of head of David
D. Lewis, a fine specimen of information retrieval
consultant.
David D. Lewis, Ph.D.
1341 W. Fullerton Ave., #251
Chicago, IL 60614-2362
United States

phone: 773-975-0304
fax: 773-289-0507
email: Anti-spam image of my email
address. The address is my first name, dave, followed by my last name,
lewis, at daviddlewis dot com.



Services: I work with clients to make the most effective use possible of textual data. Applications I have worked on include search engines, text categorization, filtering of email and web pages, mining of customer data, and a variety of others. My clients have included both vendors and users of text processing software, and my work with them has included mining data sets, analyzing manual and automated text processing procedures, designing algorithms and system architectures, performing competitive and strategic analysis, training, and ongoing advisory relationships. I also have served as a consulting expert in a number of patent cases.

Since 2006 the focus of my consulting has been shifting largely but not exclusively to the field of electronic discovery in legal cases. My work there falls roughly into three groups:

  • Design of algorithms and person-machine processes for machine learning and statistical quality control.
  • Expert witness work in discovery disputes.
  • Academic research, in collaboration with university colleagues, on statistical and machine learning issues in e-discovery. I was a co-founder of the TREC Legal Track and creator of the CDIP (aka tobacco document) collection, the first large scale, publicly available test collection for e-discovery research.

Biography: David D. Lewis became a full-time consultant in 2000, but he's done consulting work off and on since graduate school. He has worked with a variety of organizations, including small and large companies, universities, and nonprofit organizations. From 1992 to 2000, Dave was a researcher at AT&T Labs and Bell Labs, where he did research and built prototype systems in the areas of information retrieval, machine learning, natural language processing, and evaluation of information systems. He also advised AT&T business units and AT&T Ventures on investments in technology and companies in these areas.

From 1991 to 1992, Dave Lewis was a research faculty member at the University of Chicago. He earned his Ph.D. in Computer Science at the University of Massachusetts at Amherst, under the direction of W. Bruce Croft. His Ph.D. dissertation won the 1992 American Society for Information Science Doctoral Forum Award. Dave has published more than 75 scientific papers and 8 patents, and is a frequent invited speaker and tutorial presenter. He is a Fellow of the American Association for the Advancement of Science.

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