EC Library Guide on the history of the European Commission: EU resources

(in chronological order)

2014-2019, Juncker Commission: Review of the Juncker Commission

European Commission, Directorate-General for Communication, Publications Office, 2019.
The Juncker Commission's ten priorities: An end-of-term assessment, in-depth analysis

European Parliament, Directorate-General for Parliamentary Research Services, Bassot, E., Hiller, W., European Parliament, 2019,

On the eve of the 2019 European Parliament elections, the paper is intended both to assess the extent to which the Juncker Commission has met the targets that it set itself, to take note of the achievements made to date and to identify areas in which difficulties have been, or continue to be, encountered.

Autumn 2018 Mid-term, 2017 Early 2018 Start of 2017 Mid-2016

The Juncker Commission and new institutional and legitimacy set up: What main issues and challenges? In-depth analysis by Bertoncini, Yves, European Parliament, Directorate-General for Internal Policies of the Union.
Publication Date: 2015
The Juncker Commission's legitimacy and effectiveness in is being assessed connection with on the one side its composition, its organisation and functioning, and on the other side with its capacity to enhance legitimacy in the exercise of the EU's competences and enhance and its input efficiency.