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Dr Tomás Lejarraga

Dr Tomás Lejarraga
Senior Lecturer
Business Organization
  • Despatx DB119Primer pisGaspar Melchor de Jovellanos


Brief CV

Tomás is the Director of the UIB Decision Science Laboratory. He received his doctorate in Universitat Pompeu Fabra (Spain) in 2009. He was a Postdoctoral Fellow at the Dynamic Decision Making Laboratory in Carnegie Mellon University (USA), and later a Visiting Associate Professor at the Universitat de les Illes Balears (Spain). From 2013 to 2016, Tomás was a Research Scientist at the Center for Adaptive Rationality in the Max Planck Institute for Human Development in Berlin (Germany). He is interested in how individuals and groups explore, process, and integrate descriptive (symbolic information) and personally experienced information when making decisions. His most recent publications are:

Lejarraga, T., Lucena, A. & Rubí-Barceló, A. (2020). Beliefs estimated from choices in Proposer-Responder Games. Journal of Economic Behavior and Organization, in press.

Lejarraga, T. & Lejarraga, J. (2020). Confidence and the Description-Experience Distinction, Organizational Behavior and Human Decision Processes, 161, 201-212.

Lejarraga, T., Schulte-Mecklenbeck, M., Pachur, T., & Hertwig, R. (2019). The Attention-Aversion Gap: How Allocation of Attention Relates to Loss Aversion, Evolution and Human Behavior, 40, 457-469.

Lejarraga, T., Frey, R., Schnitzlein, D., & Hertwig, T. (2019). No Effect of Birth Order on Adult Risk Taking, Proceedings of the National Academy of Sciences, 116, 6019-6024.

More information


Office Hours

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Teaching, 5 previous years

Subject Information
11320 - Business Organization and Strategy
  • Master's in Agronomic Engineering2016-17
  • Master's in Industrial Engineering2016-17
11322 - Human Resource Management
  • Master's in Industrial Engineering2016-17
20505 - Organisational Design and Human Resources
20531 - Final Degree Project
21222 - Final Degree Project
  • Degree in Business Administration2019-20
  • Double Degree in Business Administration and Tourism2019-20


Research groups

Group Membership type
Decision Science Main researcher
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