The New Party Entry Dataset

We can also present a new dataset containing time-series-cross-section information on new party parliamentary entrance. The data include information from 18 West European countries during the period 1960-2010 and was gathered as a part of the PhD-project Making the Breakthrough. An Agency-Centred Perspective on New Party Entrance into National Parliament (Bolin 2012). In the PhD thesis also four in-depth case studies of new entrants in the Swedish national parliament was conducted. The thesis can be downloaded (in Swedish) from

Release May 2012

New Party Entrance Dataset (.xls)

NPED Codebook (.pdf)

List of new party entrances (.pdf)