Below is the abstract of an article I wrote for the 13th International Conference on Energy Economics and Technology in 2019. Link to full paper at the end of the post.
Our aim in this research paper is to assess the evolution of European Union’s electricity policy ambition. To find its electricity policy ambition we identify the targets and objectives of EU legislation and analyse their evolution in time, for the four main pillars of the EU electricity policy and for our selected categories.
The assessment is based on a policy density and policy intensity analysis. The empirical research resulted in about 300 pieces of binding EU legislation in the electricity sector, reuniting around 700 targets and objectives, during 30 years of collected data.
The policy density analysis covered several dimensions: stages, overall numbers, EUR-Lex placement, pillars and categories. The research found that legally-binding legislation has an upward trend from 1986 to 2018. Almost half of the EU electricity legislation classifies as environment legislation, if analysed from the pillars of energy policy viewpoint. If a more nuanced filter is used, categories, then environment and nuclear legislation make about two thirds of all EU electricity-relevant binding legislation.
The policy intensity analysis revealed that, using a categories filter, environment and internal market are dominating, with the nuclear categories far behind. It reveals that there are many pieces of legislation in the nuclear sector, but they are generally less complex, with fewer targets and objectives than other fields.
Constructing a major targets/objectives and categories matrix, we found that the largest amount of financing is towards nuclear research. Most expansion of duties for the European Commission happened for the internal electricity market category, followed by, surprisingly, security of supply. Major developments took place mainly for environmental; energy efficiency and savings; and internal energy market categories.

Link: https://tu-dresden.de/bu/wirtschaft/bwl/ee2/ressourcen/dateien/enerday-2019/Paper-Bostan.pdf?lang=en