Political Data Yearbook Since 2010 the Institute of Political Science has been involved in co-editing the Political Data Yearbook. The Political Data Yearbook (PDY) is a publication of the European Journal of Political Research (EJPR), published as a double issue at the end of each volume since 1992. It documents election results, national referenda, changes in government, and institutional reforms in all of the EU member states, plus Australia, Canada, Iceland, Israel, Japan, New Zealand, Norway, Switzerland, and the United States. In addition, recognized experts on the politics of each country provide commentary on these events, as well as on the principal issues in national politics during the year. EJPR is the flagship publication of the European Consortium for Political Research (ECPR) and one of the most well-respected journals in the discipline. Since 2010 the PDY has been co-edited by Daniele Caramani and Tim Bale, University of Sussex.