Portrait of Prof. Guillermo Gallego  

Guillermo Gallego

Liu Family Professor Emeritus of Industrial Engineering and Operations Research

822 Schapiro CEPSR

Research Interests

Prof Gallego’s research interests are Pricing Analytics, including Discrete Choice Modeling, Assortment Optimization and its applications to Demand and Supply Analytics.

Research Areas

Modeling & Simulation

Over the course of his career, Professor Guillermo Gallego has made significant contributions to the field of IEOR, both in theoretical research and through strong collaboration with global corporations such as Disney World, Hewlett Packard, IBM, Lucent Technologies, Nomis Solutions, and Sabre Airline Solutions.

Professor Gallego has published influential papers in the leading journals of his field, where he also occupied a variety of editorial positions. His work has been supported by numerous industrial and government grants, and he has worked with government agencies such as the National Research Council, the National Science Foundation in United States and the Ireland Development Agency. Many of 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.


  • Liu Family Emeritus Professor, Columbia University 2017-present
  • Crown Worldwide Professor, HKUST 2016-present
  • Liu Family Professor, Columbia University 2012–2017
  • Department Chair, Columbia University 2002–2008
  • Professor, Columbia University 1997-2016
  • Associate Professor, Columbia University 1993–1997
  • Assistant Professor, Columbia University 1988-1993


  • INFORMS Best OM Paper in Management Science, 2017
  • INFORMS Impact Prize, 2016
  • Keynote Speaker INFORMS Annual meeting, Minneapolis, 2013
  • MSOM Distinguished Fellow, class of 2013
  • INFORMS Fellow, class of 2012
  • INFORMS Revenue Management and Pricing Practice Prize, 2012
  • INFORMS Revenue Management and Pricing Historical Prize, 2011
  • INFORMS Revenue Management and Pricing Section Prize, 2005


  • Gallego, G. and G. van Ryzin. 1994. Optimal Dynamic Pricing of Inventories with Stochastic Demands over Finite Horizons. Management Science. 40, 999-1020.
  • 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.
  • Gallego, G. and G. van Ryzin. 1997. A Multi-Product Dynamic Pricing Model with Applications to Network Yield Management. Operations Research. 45, 24- 41.
  • Gallego, G., R. Ratliff, and S. Shebalov. 2013. A General Attraction Model and an Efficient Formulation for the Network Revenue Management Problem. Operations Research, 61, 1, 212-232.
  • Davis, J., G. Gallego, and H. Topaloglu. 2014. Assortment Optimization under Variants of the Nested Logit Model. Operations Research, 62(2) 250 - 273.
  • Gallego, G. and R. Wang. 2014. Multiproduct Price Optimization and Competition Under the Nested Logit Model with Product-Differentiated Price Sensitivities. Operations Research, 62 (2), 450 - 461.
  • Gallego, G. and M. Hu. 2014. Dynamic Pricing of Perishable Assets under Competition. Management Science, 60 (5), 1241-1259.
  • Gallego, G. and Talebian, M. 2014. Commissions and Sales Targets Under Competition. Management Science, 60, 9, 2180 - 2197.
  • Gallego, G., H. Topalopglu. 2014. Constrained Optimization for the Nested Logit Model. Management Science, 60, 10, 2583-2601.
  • Blanchet, J., Gallego, G. and Goyal, V. 2016. A Markov Chain Approximation to Choice Modeling. Operations Research, 64, 4, 886-905.