HKUST LOGO Hong Kong University of Science and Technology IEEM LOGO Department of Industrial Engineering and Decision Analytics (IEDA)


Prof Guillermo GALLEGO
(PhD, Cornell University, 1988)
Head / Chair Professor / Crown Worldwide Professor of Engineering


Professor Guillermo Gallego is the Department Head of Industrial Engineering and Decision Analytics, and also the Crown Worldwide Professor of Engineering.

Prior to his appointment in January 2016, Prof. Gallego was the Liu Family Professor at the Department of Industrial Engineering and Operations Research at Columbia University, where he served as the Department Chairman from 2002-2008. He was named a Manufacturing and Service Operations Management Society (MSOM) Fellow in 2013, Informs Fellow in 2012 and has been the recipient of many awards including the Informs Revenue Management Section Prize (2005), the Revenue ­­Management Historical Prize (2011), the Revenue Management Practice Prize (2012) and the INFORMS Impact Prize (2016).

Prof. Gallego’s research interests are Dynamic Pricing and Revenue Optimization, Supply Chain Management, Electronic Commerce, and Inventory Theory. He has published influential papers in the leading journals of his field where he has also occupied a variety of editorial positions. His work has been supported by numerous industrial and government grants. In addition to theoretical research, Prof. Gallego has developed strong collaboration with global corporations such as Disney World, Hewlett Packard, IBM, Lucent Technologies, Nomis Solutions, and Sabre Airline Solutions. He has also worked with government agencies such as the National Research Council, the National Science Foundation in the United States and the Ireland Development Agency. His graduate students are associated with prestigious universities and occupy leading roles in their chosen fields. He spent his 1996-97 sabbatical at Stanford University and was a visiting scientist at the IBM Watson Research Center from 1999-2003.

Prof. Gallego received both his PhD degree (1988) and MS degree (1987) in Operations Research and Industrial Engineering from Cornell University.


Ph.D. Cornell University, Ithaca, NY. January 1988.
Operations Research and Industrial Engineering.
Minors: Economics and Statistics.
Advisor: R. Roundy
M.S. Cornell University, Ithaca, NY. January 1987.
Operations Research and Industrial Engineering.
B.A. University of California, San Diego, CA. January 1980.
Mathematics, with honors.
Minors: Economics and Psychology

Professional Experience

2017-present Liu Family Emeritus Professor Columbia University
2016-present Department Head & Chair Professor. Dept. of Ind. Eng. & Decision Analytics, HKUST
2016-present Crown Worldwide Professor of Engineering. Dept. of Ind. Eng. & Decision Analytics, HKUST
2012-2017 Liu Family Professor. Dept. of Ind. Eng. & Oper. Res. Columbia University
2002-2008 Department Chairman Ind. Eng. & Oper. Res. Columbia University
2000-2016 Professor. Dept. of Ind. Eng. & Oper. Res. Columbia University
1999-2003 Visiting Scientist. IBM Watson Research Center, NY.
1999-2001 Co-director, MS in Financial Engineering program.
1996-1997 Visiting Associate Professor. Graduate School of Business. Stanford University
1995-2000 Tenured Associate Professor, Dept. of Ind. Eng. & Oper. Res. Columbia University
1994-2000 Co-director Deming Center Columbia University
1994-1995 Associate Professor. Dept. of Ind. Eng. & Oper. Res. Columbia University
1988-1993 Assistant Professor. Dept. of Ind. Eng. & Oper. Res. Columbia University

Honors and Awards


Professional Activities

2013-2014 Edelman prize committee
2012-2014 Revenue Management and Pricing award committee
2007-2009 von Neumann prize committee
2006 Co-organizer of "Management Science Unleashed" conference at IBM.
2005-2013 Senior Editor POMS
2004-2007 Founder and co-organizer of INFORMS Revenue Management and Pricing Section Conference
2002-2008 Chairperson, IEOR Department, Columbia University
2002-2006 Senior Editor M&SOM
1998-2002 Editorial Board Member M&SOM
1997-2001 Departmental Editor IIE-Transactions
1994-2002 Associate Editor Management Science
1994-2006 Associate Editor Naval Research Logistics
1994-2000 Associate Editor Operations Research
1992-1997 Associate Editor IIE-Transactions

Administrative Work

Professional Society Memberships

Research Grants

Invited Talks

Publications: 7511 Google Citations as of September 2016

1. Gallego, G., and D. Simchi-Levi. 1990. On the E ectiveness of Direct Shipping Strategy for One Warehouse Multi-Retailer R-Systems Management Science. 36, 240-243.
2. Gallego, G. 1990. Scheduling the Production of Several Items with Random Demands in a Single Facility. Management Science. 36, 1579-1592.
3. Gallego, G. 1990. An Extension to the Class of Easy Economic Lot Scheduling Problems. IIE Transactions. 22, 189-191.
4. Inman, R., P. Jones, and G. Gallego. 1991. Economic Lot Scheduling of Fully Loaded Processes with External Setups. Naval Research Logistics. 38, 699-714.
5. Moon, I., G. Gallego, and D. Simchi-Levi. 1991. Controllable Production Rates in a Family Productions Context. International Journal of Production Research. 29, 2459- 2470.
6. Gallego, G. 1992. A Min-Max Distribution Free Procedure for the (Q,R) Inventory Model. Operations Research Letters. 11, 55-60.
7. Gallego, G. and I. Moon. 1992. The E ect of Externalizing Setups in the Economic Lot Scheduling Problem. Operations Research. 40, 614-619.
8. Gallego, G., D. Shaw, and D. Simchi-Levi. 1992. The Complexity of the Staggering Problem and other Classical Inventory Problems. Operations Research Letters. 12, 47- 52.
9. Gallego, G., and R. Roundy. 1992. The Economic Lot Scheduling Problem with Finite Backorder Costs. Naval Research Logistics. 39, 729-739.
10. Gallego, G. 1993. Reduced Production Rates in the Economic Lot Scheduling Problem. International Journal of Production Research. 31, 1035-1046.
11. Gallego, G. and I. Moon. 1993. The Distribution Free Newsboy Problem: Review and Extensions. Journal of the Operational Research Society. 44, 825-834.
12. Gallego, G., D. Yao, and I. Moon. 1994. Optimal Control of a Manufacturing Process that Involves Trial Runs. Management Science. 39, 1499-1505.
13. Gallego, G., and D. Joneja. 1994. Economic Lot Scheduling Problem with Raw Material Considerations. Operations Research. 42, 92-101.
14. Gallego, G. 1994. When is a Base Stock Policy Optimal in Recovering Cyclic Schedules? Naval Research Logistics. 41, 317-333.
15. Gallego, G. and D. Simchi-Levi. 1994. Rejoinder to a Note on Bounds for Direct Shipping. Management Science. 40, 1393.
16. Gallego, G. and G. van Ryzin. 1994. Optimal Dynamic Pricing of Inventories with Stochastic Demands over Finite Horizons. Management Science. 40, 999-1020.
17. Moon, I. and G. Gallego. 1994. Distribution Free Procedures for Some Inventory Models. Journal of the Operational Research Society. 45, 651-658.
18. Feng, Y. and G. Gallego. 1995. Optimal Starting Times for End of Season Sales and Optimal Stopping Times for Promotional Fares. Management Science. 41, 1371-1391.
19. Gallego, G. and I. Moon. 1995. Strategic Investment to Reduce Setup Times in the Economic Lot Scheduling Problem. Naval Research Logistics. 42, 773-790.
20. Gallego, G. and M. Queyranne. 1995. Inventory Coordination and Pricing Decisions: Analysis of a Simple Class of Heuristics. Chapter 6 in Optimization in Industry 3, Mathematical
Programming and Modeling Techniques in Practice, Anna Sciomachen, Ed. Wiley.
21. Gallego, G. 1996. A New Demand Model for Yield Management. Proceedings of the AGIFOR society
22. Gallego, G. and I. Moon. 1996. How to Avoid Stockouts when Producing Several Items in a Single Facility? What to do if you Can't. Computers Operations Research. 23, 1-12.
23. Gallego, G., M. Queyranne, and D. Simchi-Levi. 1996. Single Resource Multi-Item Inventory Systems. Operations Research. 44, 580-595.
24. Gallego, G. and G. van Ryzin. 1997. A Multi-Product Dynamic Pricing Model with Applications to Network Yield Management. Operations Research. 45, 24-41.
25. Gallego, G., and D. Shaw. 1997. On The Complexity of the Economic Lot Scheduling Problem with General Cyclic Schedules. IIE Transactions. 29, 109-113.
26. Gallego, G. 1998. New Bounds and Heuristics for (Q,R) Policies. Management Science, 44, 219-233.
27. Gallego, G. and P. Zipkin. 1999. Qualitative Analysis of Multi-Stage Production- Transportation Systems: Stock Positioning and Performance Estimation. MSOM, 1, 77-88.
28. Feng, Y. and G. Gallego. 2000. Perishable Asset Revenue Management with Markovian Time Dependent Demand Intensities. Management Science, 46, 941-956.
29. Gallego, G. and A. Scheller-Wolf. 2000. Capacitated Inventory Problems with Fixed Order Costs: Some Optimal Policy Structure. European Journal of Operations Research, 126:3, 603-613.
30. Gallego, G., J. K. Ryan, and D. Simchi-Levi. 2001. Minimax Analysis for Discrete Finite Horizon Inventory Models. IIE Transactions, 33, 861-874.
31. Boyac, T., and G. Gallego. 2001. Serial Production/Distribution Systems Under Service Constraints. MSOM, 3, 43-50.
32. Boyac, T., and G. Gallego. 2001. Minimizing Holding and Ordering Costs Subject to a Bound on Backorders is as Easy as Solving a Single Backorder Cost Model. Operations Research Letters 29, 87-92.
33. Gallego, G., and  O.  Ozer. 2001. Integrating Replenishment Decisions With Advance Demand Information. Management Science 47, 1344-1360.
34. Gallego, G., and  O.  Ozer. 2001. Optimal Use of Demand Information in Supply Chain Management. 2001. In: Supply Chain Structures: Coordination, Information, and Optimization, J.S. Song and D.D. Yao (eds.), Kluwer.
35. Boyac, T., and G. Gallego. 2002. Coordination Pricing and Inventory Replenishment Policies for One Wholesaler and One or more Geographically Dispersed Retailers. Inter- national Journal of Production Economics 77, 95-11.
36. Boyac, T., and G. Gallego. 2002. Managing Waiting Times of Backordered Demands in Single-Stage (Q,r) Inventory Systems. Naval Research Logistics, 49, 557-573.
37. Heching, A., Gallego, G. and G. van Ryzin. 2002. Markdown Pricing: An Empirical Analysis of Policies and Revenue Potential at One Apparel Retailer Journal of Revenue and Pricing Management, 1:2, 139-160.
38. Gallego, G. and  O.  Ozer. 2003. Optimal Replenishment Policies for Multi-Echelon Inventory Problems under Advance Demand Information. MSOM, 5, 157-175.
39. Boyac, T., G. Gallego, K.H. Shang, J.S. Song. 2003. Erratum to Bounds in Serial Production/ Distribution Systems under Service Constraints. MSOM 5, 372-374.
40. Grey W, Katircioglu K, Bagchi S, Shi DL, Gallego G, Seybold D, Stefanis. 2003. An analytic approach for quantifying the value of e-business initiatives IBM SYSTEMS JOUR-
NAL 42, (3): 484-497.
41. Boyac, T., and G. Gallego. 2004. Supply Chain Coordination in a Market with Customer Service Competition. Production and Operations Management 13, (1): 3-22.
42. Gallego, G. and H. Hu. 2004. Optimal policies for production/inventory systems with nite capacity and Markov-modulated demand and supply processes, in Stochastic Models
of Production-Inventory Systems, G. Liberopoulos et al. (eds.), Annals of Operations Research, 125/126.
43. G. Gallego and B. Toktay. 2004. All-or-Nothing Ordering under a Capacity Constraint. Operations Research 52:6, 1001-1002.
44. Gallego, G. and R. Phillips 2004. Revenue Management of Flexible Products. MSOM, 6, 1-17.
45. G. Gallego and  O.  Ozer. 2005. A New Algorithm and a New Heuristic for Serial Supply Systems. Operations Research Letters, 33:4, 349-362.
46. Q. Feng, G. Gallego, S. P. Sethi, H. Yan and H. Zhang. 2005. A Periodic-Review Inventory Model with Three Consecutive Delivery Modes and Forecast Updates. Journal of Optimization Theory and Applications 124:1, 1573-2878.
47. Gallego G, S. P. Sethi. 2005. K-convexity in R-n. Journal of Optimization Theory and Applications 127:1, 71-88.
48. Gallego, G., S. Krishnamoorthy, Phillips, R. 2006. Dynamic Revenue Management Games with Forward and Spot Markets. Journal of Revenue and Pricing Management 5, 10-31.
49. Gallego G, Katircioglu K, Ramachandran B. 2006. Semiconductor inventory management with multiple grade parts and downgrading. Production Planning & Control 17:7, 689-
50. Gallego G, Huh WT, Kang W, Phillips R. 2006. Linear convergence of Tatonnement in a Bertrand oligopoly. Lecture Notes in Computational Science and its Applications 3982,
51. Gallego, G., W. T. Hu, W. Kang, and Phillips, R. 2006. Price Competition with the Attraction Demand Model: Existence of Unique Equilibrium and Its Stability. MSOM, 8:4, 359-375.
52. Gallego, G, Y. Jin, A. Muriel, G. Zhang and V.T. Yildiz 2007. Optimal ordering policies with convertible lead times. European Journal of Operations Research 176:2, 892-910.
53. Gallego, G., Katircioglu, K. and B. Ramachandran. 2007 Inventory management under highly uncertain demand. Operations Research Letters, 35: 3, 281-289.
54. Gallego, G.  O.  Ozer, and P. Zipkin. 2007. Bounds, Heuristics and Approximations for Distribution Systems. Operations Research, 55:3, 503-517.
55. Gallego, G., R. Phillips, and Kou, S. 2008. Revenue Management of Callable Products. Management Science, 54, 550-564.
56. Gallego, G., Sahin, O., and Phillips, R. 2008. Strategic Management of Distressed Inventory. Production and Operations Management Society. 4, 402-415.
57. Gallego, G., Krishnamoorthy S. and R. Phillips. 2009. Competitive Revenue Management with Forward and Spot Markets. Journal of Revenue and Pricing Management.
58. Gallego, G. Lin, L. and R. Ratli . 2009. Choice-based EMSR methods for single-leg revenue management with demand dependencies. Journal of Revenue and Pricing Man-agement, 8, 207-240.
59. Chen S. Gallego, G., and Li. M. 2010. Optimal seat allocation for two-flight problems with a f exible demand segment. European Journal of Operations Research 3, 897-908.
60. Gallego, G. and O. Sahin. 2010. Revenue Management with Partially Refundable Fares. Operations Research, 58, 817 - 833.
61. Gallego, G., S. Krishnamoorthy, Phillips, R. 2011. Competitive Revenue Management with Forward and Spot Markets. Journal of Revenue and Pricing Management, 10, 132160.
62. Gallego, G. 2011. Revenue Management. Chapter in The Wiley Encyclopedia of Operations Research and Management Science. James J. Cochran, editor.
63. Katricioglu, K. and G. Gallego. 2011. A Practical Multi-Echelon Inventory Model with Semiconductor Manufacturing Application. Chapter in Planning Production and Inventories
in the extended enterprise. International Series in Operations Research & Management Science, 2011, Volume 152, 133-151.
64. Gallego, G. and C. Stefanescu. 2012. Services Engineering: Design and Pricing of Service Features. Chapter in The Oxford Handbook of Pricing Management. Ozer, 0. and R. Phillips, editors. Oxford University Press.
65. Gallego, G. and M. Talebian. 2012. Demand Learning and Dynamic Pricing for Multi-Version Products. Journal of Pricing and Revenue Management, 11, 303 - 318.
66. Blanchet, J, Gallego, G., and V. Goyal. 2013. A Markov chain approximation to choice modeling. ACM Conference on Electronic Commerce, 103-104.
67. Gallego, G., R. Ratli , and S. Shebalov. 2013. A General Attraction Model and an Eff-cient Formulation for the Network Revenue Management Problem. Operations Research,
61, 1, 212-232
68. Davis, J., G. Gallego, and H. Topaloglu. 2014. Assortment Optimization under Variants of the Nested Logit Model. Operations Research, 62(2) 250 - 273.
69. Gallego, G. and R. Wang. 2014. Multiproduct Price Optimization and Competition Under the Nested Logit Model with Product-Di erentiated Price Sensitivities. Operations Research, 62 (2), 450 - 461.
70. Gallego, G. and M. Hu. 2014. Dynamic Pricing of Perishable Assets under Competition. Management Science, 60 (5), 1241-1259.
71. Gallego, G. and Talebian, M. 2014. Commissions and Sales Targets Under Competition. Management Science, 60, 9, 2180 - 2197
72. Gallego, G., H. Topalopglu. 2014. Constrained Optimization for the Nested Logit Model. Management Science, 60, 10, 2583-2601
73. Gallego, G., Wang, R., Ward, J., Hu, Ming, Beltran, J., Kayis, E., and S. Jain. 2015. Flexible Duration Warranties with Dynamic Reliability Learning. Production and Oper-rations Management, 23, 4, 645-659.
74. Gallego, G., Wang, R., Hu, Ming, Ward, J, and J. L. Beltran. 2015. No Claim? Your Gain: Design of Residual Value Extended Warranties Under Risk Aversion and Strategic Claim Behavior. MSOM, 17, 1, 87-100.
75. Blanchet, J., Gallego, G. and Goyal, V. 2016. A Markov Chain Approximation to Choice Modeling. Operations Research, 64, 4, 886-905.
76. Gallego, G., and Scheller-Wolf, Alan. 2016. Corrigendum to capacitated inventory problems with xed ordering costs: some optimal policy structure. EJOR 253, 1, 241.

Papers Submitted for Publication

Work in Progress

Doctoral Students

Name PhD date Current Affiliation Position
Ilkyeong Moon July 1991 Pusan University Professor
  July 2010 Seoul University Professor
Youyi Feng July 1994 Chinese University of Hong Kong Associate Professor
  July 2009 Zaragoza Logistics Center, Spain Professor
  July 2015 Sichuan University Professor
Tamer Boyac July 1998 McGill University Professor
  July 2015 EMST Berlin  
A. Ozalp Ozer July 2000 Stanford University Assistant Professor
  July 2009 UT Dallas Professor
Haichu Hu May 2001 Goldman Sachs Vice President
Zheng Wang May 2004 Citibank Vice President
Srinivas Krishnamoorthy July 2005 Ivey School of Business Assistant Professor
Haengju Lee July 2005 Xerox Analyst
Ge Zhang July 2005 SFG&E Analyst
Ozge Sahin June 2006 University of Michigan Assistant Professor
  July 2011 Johns Hopkins University Associate Professor
Ming Hu May 2008 University of Toronto Assistant Professor
Lin Li May 2008 Sabre Research Scientist
Ruxian Wang May 2011 HP  
  July 2013 Johns Hopkins University  

Courses taught at Columbia University

IEOR E3402 Production Planning and Inventory Control
IEOR E3404 Production Scheduling
IEOR 4000 Production Management
IEOR E4003 Industrial Economics
SIEOR E4150 Probability and Statistics
IEOR 4574 Business Analytics
IEOR E4706 Financial Engineering I
IEOR E4700 Intro to Financial Engineering
IEOR E4601 Dynamic Pricing and Revenue Management
Mgmt. Sc.-IEOR W6406 Inventory Planning Models
Mgmt. Sc.-IEOR W6408 Inventory Theory
IEOR E6609 Dynamic Programming
B6015 Decision Models
B7015 Decision Models
IEOR E8100 Seminar Revenue Management

Courses taught at HKUST

IELM 1010/1020 Academic and Personal Development
IELM 6010c Seminar on Dynamic Pricing and Revenue Optimization