Funding for this research was provided by:
Universidad de Navarra
Article History
Accepted: 21 March 2023
First Online: 5 April 2023
Declaration
:
: Luis A. Gil-Alana gratefully acknowledges financial support from the MINEIC-AEI-FEDER ECO2017-85503-R project from ‘Ministerio de Economía, Industria y Competitividad’ (MINEIC), `Agencia Estatal de Investigación' (AEI) Spain and `Fondo Europeo de Desarrollo Regional' (FEDER).