1Department of Quantitative Methods, University of the Basque Country UPV/EHU, Avda. Lehendakari Aguirre 83, 48015 Bilbao, Spain
2Department of Economic Analysis, University of the Basque Country UPV/EHU, Avda. Lehendakari Aguirre 83, 48015 Bilbao, Spain
3Nova School of Business and Economics (Nova SBE) NOVAFRICA, and BELAB, Carcavelos, Portugal
4Institute of Mathematics and Applications, University of Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain
5ARAID Foundation, Government of Aragon, Zaragoza, Spain
6Institute for Cross-Disciplinary Physics and Complex Systems (IFISC, UIB-CSIC) Campus Universitat de Les Illes Balears, 07122 Palma de Mallorca, Spain
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