Funding for this research was provided by:
Ministerio de Economía, Industria y Competitividad, Gobierno de España (MTM2016-76497-R, MTM2016-76497-R)
Finance for Energy Markets
Article History
Received: 26 February 2019
Accepted: 13 March 2019
First Online: 4 April 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.