“…Some papers that analyze price drivers of CO 2 emission allowance prices are Alberola et al (2007Alberola et al ( , 2008a, Chevallier (2009), Hintermann (2010, Kim and Koo (2010), Hitzemann and Uhrig-Homburg (2013), Wang et al (2013) andHammoudeh et al (2014a,b) among many others. Price drivers of CO 2 emission allowances are temperature (Alberola et al, 2008a;Hinterman, 2010), prices of fuel, crude oil, coal and natural gas (Alberola et al, 2008a;Hintermann, 2010;Kim and Koo, 2010;Hammoudeh et al, 2014c), macroeconomic variables, production structures change and population growth (Chevalier, 2009;Conrad et al, 2012;Wang et al, 2013).…”