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Data and Documentation

CLEA Lower Chamber Elections Archive
The dataset currently includes 2025 elections from 180 countries and territories.

CLEA Upper Chamber Elections Archive
The dataset currently includes 181 elections from 24 countries.

GeoReferenced Electoral Districts
The GRED datasets are geo-referenced maps for electoral districts in countries from the CLEA Lower Chamber elections archive. The goal of this project is to offer maps formatted in a manner so they can be linked to other standard geo-referenced data, allowing researchers to test a variety of research questions at a subnational level.

Party Nationalization Measures
The party nationalization datasets contain the effective number of parties, as well as several measures of party nationalization, at three different levels of aggregation: the national level, the party level, and the constituency level. They are provided for both the Lower Chamber and Upper Chamber elections results.