A new dataset on decision-making in the European Union before and after the 2004 and 2007 enlargements (DEUII)

Robert Thomson, Javier Arregui, Dirk Leuffen, Rory Costello, James Cross, Robin Hertz, Thomas Elbenhardt Jensen

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72 Citations (Scopus)


We present a new dataset on decision-making in the European Union (DEUII) that revises and expands a previous dataset. Researchers are using this new dataset to address a range of research questions regarding the inputs, processes and outputs of the EU's legislative system. The dataset contains information on 331 controversial issues raised by 125 legislative proposals that were introduced between 1996 and 2008. For each of these controversial issues, the dataset identifies the policy alternative favoured most by each of the main political actors: the European Commission; the European Parliament; and each of the member states' representatives in the Council of Ministers. This information was assembled during 349 semi-structured interviews with key informants. This article describes the dataset and identifies its relevance to several research agendas in EU studies.

Original languageEnglish
Pages (from-to)604-622
Number of pages19
JournalJournal of European Public Policy
Issue number4
Publication statusPublished - May 2012
Externally publishedYes


  • dataset
  • European Union
  • legislative politics
  • policy positions

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