Sumit Sarkar

Charles and Nancy Davidson Chair and Professor of Information Systems

Director, PhD Programs

Academic Director, ICDRiA

PhD, University of Rochester

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SM 3.422, School of Management

University of Texas at Dallas

Phone: 972.883.6854, Fax: 972.883.2089

Email: sumit[at]utdallas[dot]edu


Research Interests

My research focuses on the management of data and knowledge in business environments. My early research centered on the representation of uncertainty, and reasoning under uncertainty, for decision making in automated and semi-automated environments. This included, in the context of databases, the representation of uncertainty in relational databases using probability calculus and reasoning mechanisms to deal with such uncertainty in the data. In the context of knowledge-based systems, I have worked on efficient representations of uncertainty (again using probability measures), as well as learning knowledge-based structures from data. That work has led to several research streams. In one stream, I examine the impact of information quality on decision making, developing mechanisms to estimate the quality of information derived from imperfect data. Another stream looks at ways to reconcile information originating from diverse imperfect data sources. A third stream looks at ways to minimize data privacy concerns that arise when organizations share data with each other. More recently, I have been working in the area of personalization, studying how patterns of user behavior can be used to learn customer profiles and to improve recommendations in online commerce. Another area of research examines software release policies.


Selected Publications


Personalization and Recommendation Technologies

M. Johar, V. Mookerjee and S. Sarkar “Selling Vs Profiling: Optimizing the Offer Set in Web-based Personalization,” Information Systems Research, pp. 285-306, vol. 25, no. 2, June 2014.

 

A. Ghoshal and S. Sarkar “Association Rules for Recommendations with Multiple Items” Informs Journal on Computing, vol. 26, no. 3, pp. 433-448 (2014).

P. Atahan and S. Sarkar “Accelerated Learning of User Profiles Management Science, pp. 215-239, vol. 57, No. 2, February 2011.

D. Liu, S. Sarkar and C. Sriskandarajah “An Optimal Resource Allocation Policy for Personalization in Content Delivery Sites” Information Systems Research, June 2010; 21: pp. 227 - 248.

R. Gupta, A. Bagchi, and S. Sarkar “Improving Linkage of Web Pages,” INFORMS Journal on Computing, pp. 127-136, Vol. 19, No. 1, Winter 2007.

B. P. S. Murthi and S. Sarkar “The Role of the Management Sciences in Research on Personalization,” Management Science, pp. 1344-1362, vol. 49, no. 10, October 2003.


Data Privacy

X. Li and S. Sarkar “Digression and Value-Concatenation to Enable Privacy-Preserving Regression,” forthcoming in MIS Quarterly.

 

X. Li and S. SarkarData Clustering and Micro-Perturbation with Confidential Class RestrictionManagement Science, pp. 796-812, vol. 59, No. 4, April 2013.

B. Mai, N. Menon and S. Sarkar “No Free Lunch: Price Premium for Privacy Seal-Bearing Vendors,” JMIS, Vol. 27, no. 2, Fall 2010.

X. Li and S. Sarkar “Protecting Privacy Against Classification Attacks,” Operations Research, pp. 1496-1509, Vol. 57, No. 6, Nov-Dec 2009.

S. Menon and S. Sarkar “Minimizing Information Loss and Preserving Privacy,” Management Science, pp. 102-116, vol. 53, no. 1, January 2007.

X. Li and S. Sarkar “Privacy Protection in Data Mining: A Tree-Based Data Perturbation Approach,” IEEE Transactions on Data and Knowledge Engineering, pp. 1278-1283, vol. 18, no. 9, September 2006.

X. Li and S. Sarkar “A Data Perturbation Approach to Privacy Protection in Data Mining,” Information Systems Research, pp. 254-270, vol. 17, no. 3, September 2006.

S. Menon, S. Sarkar, and S. Mukherjee “Maximizing Accuracy of Shared Databases when Concealing Sensitive Patterns,” Information Systems Research, pp. 256-270, vol. 16, no. 3, September 2005.


Software Release

Z. Jiang, S. Sarkar and V. S. Jacob “Post Release Testing and Software Release Policy,” Information Systems Research, pp. 635-657, vol. 23, no. 3 (part 1 of 2), September 2012.

Z. Jiang and S. Sarkar “Speed Matters: The Role of Free Software Offer in Software Diffusion,” Journal of Management Information Systems, pp. 207-240, Vol 26, No. 3, Winter 2009-2010.


Information Quality and Decision Making

A. Parssian, S. Sarkar, and V.S. Jacob “Impact of the Union and Difference Operations on the Quality of Information Products,” Information Systems Research, pp. 99-120, vol. 20, no. 1, March 2009.

Z. Jiang, S. Sarkar, P. De and D. Dey “A Framework for Reconciling Attribute Values from Multiple Data Sources” Management Science, pp. 1946-1963, vol. 53, no. 12, December 2007.

 

Z. Jiang, V. S. Mookerjee, and S. Sarkar “Lying on the Web: Implications for Cost Effective Information Gathering,” Information Systems Research, pp. 131-148, vol. 16, no. 2, June 2005.

A. Parssian, S. Sarkar, and V.S. Jacob “Assessing Data Quality for Information Products: Impact of Selection, Projection, and Cartesian Product,” Management Science, pp. 967-982, vol. 50, no. 7, July 2004.

D. Dey, S. Sarkar, and P. De, “A Distance-Based Approach to Entity Reconciliation in Heterogeneous Databases,” IEEE Transactions on Knowledge and Data Engineering, vol. 14, no. 3, pp. 567-582, May/June 2002.

D. Dey, S. Sarkar, and P. De, "A Probabilistic Decision Model for Entity Matching in Heterogeneous Databases," Management Science, pp. 1379-1395, vol. 44, no. 10, October 1998.


Representing Uncertainty in Databases

D. Dey and S. Sarkar, "Generalized Normal Forms for Probabilistic Relational Data, IEEE Transactions on Knowledge and Data Engineering, vol. 14, no. 3, pp. 485-498, May/June 2002.

D. Dey and S. Sarkar, "Modifications of Uncertain Data: A Bayesian Framework for Belief Revision," Information Systems Research, vol. 11, no. 1, pp. 1-16, March 2000.

D. Dey and S. Sarkar, "PSQL: A Query Language for Probabilistic Relational Data," Data and Knowledge Engineering, vol. 28, no. 1, pp.107-120, 1998.

D. Dey and S. Sarkar, "A Probabilistic Relational Model and Algebra," ACM Transactions on Database Systems, vol. 21, no. 3, pp. 339-369, September 1996.


Reasoning Under Uncertainty: Bayesian Networks

S. Sarkar and R. Sriram, "Bayesian Models for Early Warnings of Bank Failures," Management Science, pp. 1457-1475, vol. 47, no. 10, November 2001.

S. Sarkar and D. Ghosh, "Partitioning the Attribute Set in a Probabilistic Reasoning System," INFORMS Journal on Computing, vol. 10, no. 4, pp. 399-416, Fall 1998.

S. Sarkar and D. Ghosh, "Contractor Accreditation: A Probabilistic Model," Decision Sciences, vol. 28, no. 2, pp. 237-258, Spring 1997.

S. Sarkar and I. Murthy, "Constructing Efficient Belief Network Structures with Expert Provided Information," IEEE Transactions on Knowledge and Data Engineering, vol 8, no. 1, pp. 134-143, 1996.

S. Sarkar, H. Mendelson, and V. Storey, "Approximate Representation of Probabilistic Data in Expert Systems," European Journal of Operational Research, pp. 488-504, 1996.

S. Sarkar and D. Ghosh, "A Probabilistic Reasoning Model: Formulation and Control Strategy," Decision Support Systems, vol. 17, pp. 365-386, 1996.

S. Sarkar, "Modeling Uncertainty Using Enhanced Tree Structures in Expert Systems," IEEE Transactions on Systems, Man, and Cybernetics, vol. 25, no. 4, pp. 592-605, April 1995.

 

S. Sarkar and I. Murthy, "Criteria to Evaluate Approximate Belief Network Representations in Expert Systems," Decision Support Systems, vol. 15, pp. 323-350, 1995.


Verification/Validation of Expert Systems

S. Sarkar and M. Ramaswamy, "Knowledge Base Decomposition to Facilitate Verification," Information Systems Research, vol. 11, no. 3, pp. 261-283, September 2000.

S. Sarkar, M. Ramaswamy, and Y. Chen, "A Hypergraph-Based Tool to Support the Verification and Validation of Rule-Based Expert Systems," Heuristics: The Journal of Intelligent Technologies, vol. 8, no. 4, pp. 61-81, 1995.

M. Ramaswamy, S. Sarkar, and Y. Chen, "A Directed Hypergraph Approach for Verifying Rule-Bases," IEEE Transactions on Knowledge and Data Engineering , vol. 9, no. 2, pp. 221-237, 1997.


Stochastic Shortest Path

I. Murthy and S. Sarkar, "Stochastic Shortest Path Problems with Piece-Wise Linear Utility Functions," Management Science, pp. S125-S136, vol. 44, no. 11, part 2 of 2, November 1998.

I. Murthy and S. Sarkar, "Exact Methods for the Stochastic Shortest Path Problem with a Decreasing Deadline Utility Function," European Journal of Operational Research, pp. 209-229, 1997.

I. Murthy and S. Sarkar, "A Relaxation Based Pruning Technique for the Stochastic Shortest Path Problem," Transportation Science, vol. 30, no. 3, pp. 220-236, August 1996.


Business Process Reengineering

D. Ghosh, S. Sarkar, and P. Dardeau, "Knowledge-Based Simulation for Business Process Redesign," International journal of Intelligent Systems in Accounting, Finance, and Management, vol. 6, pp. 163-176, 1997.


Professional Activities


- Program Co-Chair, International Conference on Information Systems, 2001

- Program Co-Chair, Workshop on Information Technology and Systems, 1999

- President, Workshop on Information Technology and Systems, Inc., 2013-2015

- Vice President and Secretary, Workshop on Information Technology and Systems, Inc., 2000-2003

- Secretary, the INFORMS Society on Information Systems, 2000-2005

- Senior Editor, Information Systems Research, 2005-2007

- Senior Editor, MIS Quarterly, 2013-2014

- Associate Editor, Management Science, 2005-present

- Associate Editor, ACM Transactions on Management Information Systems, 2012-present

- Associate Editor, Information Technology and Management, 1998-present

- Associate Editor, Risk and Decision Analysis, 2008-present

- Associate Editor, Information Systems Research, 1999-2003

- Guest Associate Editor, Management Information Systems Quarterly

- Guest Associate Editor, Production and Operations Management

- Served/serving on the INFORMS Sub-Divisions Council, WITS Advisory Board, ICIS Steering Committee