© 2022 Universidad Nacional Autónoma de México, Facultad de
Economía. This is an open access article under the CC BY-NC-ND license
(http://creativecommons.org/licenses/by-nc-nd/4.0/).
Bestelakorik adierazi ezean, itemaren baimena horrela deskribatzen da:© 2022 Universidad Nacional Autónoma de México, Facultad de Economía. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).