The Political Data Yearbook (PDY) contains comprehensive and authoritative data and analysis of electoral results, national referenda, changes in government, and institutional reforms for a range of countries, within and beyond the EU.

Recognised 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.

Its online version, PDY interactive (PDYi) is a unique data source building on the PDY content, which is freely available to the profession. PDYi provides the data in a fully searchable and downloadable format, making it a highly flexible and indispensible resource.