A database about the Members of European Parliament: Contributions and limitations of automated data collection in the study of European political elites

Over the past 25 years, a field of research concerning the careers of Members of the European Parliament (MEPs) has developed. Drawing on a massive amount of accessible open data, we have assembled an updated database including all MEPs from 1979 to September 2019. In this note, we describe the data collection processes and the construction of the database. Then, we propose an application concerning the turnover at the EP following the 2019 European elections. The longitudinal perspective provided by the database allows us to describe this turnover, which is important, but varies greatly according to nationality and political group, and does not fundamentally alter the division of parliamentary power. Finally, we identify some limitations: the lack of data in MEP profiles and difficulties both in the comparison between people from 27 countries and the comparison over a long period (1979–2019). As a result, the article shows that automated data collection can be very useful. However, in the case of individuals, as MEPs, it should be seen as a complementary source to other sources.