2026-04-17T04:10:04Z https://datacatalogue.cessda.eu/oai-pmh/v0/oai

574ffc6b920f798ee4127bec9288ff66e97440d28d2ea042b03e9bb1fb78c56d 2025-06-17T03:46:40Z language:enopenaire_data

Effective number of parties Effective number of parties doi:10.17903/FK2/T8P9VB Laakso, Markku Taagepera, Rein Κατάλογος Δεδομένων SoDaNet 2022-06-20 ELECTIONSELECTION DATAPOLITICAL PARTIES POLITICSElections The effective number of parties is a concept introduced by Laakso and Taagepera (1979), which provides for an adjusted number of political parties in a country's party system. The idea behind this measure is to count parties and, at the same time, to weight the count by their relative strength. The number of parties equals the effective number of parties only when all parties have equal strength. In any other case, the effective number of parties is lower than the actual number of parties. This measure is especially useful when comparing party systems across countries and is a frequent operationalization for the fragmentation of a party system. https://datacatalogue.sodanet.gr/oai doi:10.17903/FK2/T8P9VB 2022-06-20T23:00:04Z ddi:codebook:2_5