Aleta, Alberto http://orcid.org/0000-0002-1192-8707
Meloni, Sandro http://orcid.org/0000-0001-6202-3302
Perra, Nicola http://orcid.org/0000-0002-5559-3064
Moreno, Yamir http://orcid.org/0000-0002-0895-1893
Funding for this research was provided by:
Banco Santander (Universities International Mobility Awards)
Ministerio de Economía y Competitividad (FPI doctoral fellowship, grant FIS2017-87519-P)
Agencia Estatal de Investigación (RTI2018-093732-B-C22, María de Maeztu Program for Units of Excellence in R&D (MDM-2017-0711 to the IFISC Institute))
Gobierno de Aragón (group FENOL (E36-17R))
Article History
Received: 15 April 2019
Accepted: 3 September 2019
First Online: 11 September 2019
Competing interests
: The authors declare that they have no competing interests.