“…Both, oil and gas also drive emission allowance quotations: if, for example, the price of coal rises compared to gas, the latter will be preferred by power generators, resulting in lower CO 2 emissions (Paolella and Taschini, 2006). Exogenous factors uniquely influencing emission rights may be due to modifications of the legal framework as well as weather changes (Alberola and Chevallier, 2007;Benz and Trück, 2009). …”