EU renewable electricity law and policy : from national targets to a common market Regulation of renewable electricity in the internal electricity market : (still) a preserve of member states The regulatory options from an economic point of view: superiority of prices over quantities under real world conditions The times they are a changin The evolution of support schemes in member states over time Union law on state aid : down for the count but not knocked out by PreussenElektra Union law on free movement of goods : the protection of the environment justifies (nearly) everything except for buy European clauses for equipment Prohibition of internal customs duties and discriminatory taxation : the sometimes forgotten straightjacket 2013 to 2015 Years of upheaval Regulatory options for the creation of a common market Regulatory cross fertilization across the Atlantic