2026-05-25T09:45:06Z https://datacatalogue.cessda.eu/oai-pmh/v0/oai

5f24709294eac43f0d47b377e8734c89bfc188368746b839e1322f822e816624 2025-06-17T03:14:33Z language:enopenaire_data

DDI study level documentation for study 10.7802/1484 Dataset of Party System Change in Italian Regions. 1995-2015 Dataset of Party System Change in Italian Regions. 1995-2015 Dataset of Party System Change in Italian Regions. 1995-2015 10.7802/148410.7802/148410.7802/148410.7802/1484 Bolgherini, Silvia Bolgherini, Silvia Grimaldi, Selena Grimaldi, Selena GESIS Data Archive for the Social SciencesGESIS Datenarchiv für Sozialwissenschaften The dataset provides data on party system change in the 15 Italian Ordinary Statute Regions (OSRs) for the 1995-2015 period. The following 10 indicators are taken into account: Total number of Lists (TL); Number of effective parties in terms of votes (NEPv); Number of effective parties in terms of seats (NEPs); Standard Innovation Rate (SIR), Effective Innovation Rate (EIR); Total electoral Volatility (TV); Total Mergers (TM); Total Splits (TS); Bipolarism Index (BPL); Bipartitism Index (BPT). The dataset covers the entirely the period of the so-called Italian Second Republic (1992-2013), namely the period following the judicial inquiry Clean Hands, which caused the implosion of the previous party system. Although the end of the Second Republic is still disputed, we consider the electoral earthquake of the 2103 at the national level (Chiaramonte and De Sio 2013; Itanes 2013) to be another turn around as far as party system change is concerned. Altogether 14 elections are taken into account and grouped in electoral cycles as follows: first cycle 1990 (elections May 6, 1990); second cycle 1995 (April 23, 1995); third cycle 2000 (April 16, 2000 and November 11, 2001); fourth cycle 2005 (April 3, 2005, April 17, 2005 and November 5, 2006); fifth cycle 2010 (December 14, 2008; March 28, 2010; and October 16, 2011); sixth cycle 2015 (February 24, 2013; November 17, 2013; May 25, 2014; November 23, 2014; and May 31, 2005).The dataset provides data on party system change in the 15 Italian Ordinary Statute Regions (OSRs) for the 1995-2015 period. The following 10 indicators are taken into account: Total number of Lists (TL); Number of effective parties in terms of votes (NEPv); Number of effective parties in terms of seats (NEPs); Standard Innovation Rate (SIR), Effective Innovation Rate (EIR); Total electoral Volatility (TV); Total Mergers (TM); Total Splits (TS); Bipolarism Index (BPL); Bipartitism Index (BPT). The dataset covers the entirely the period of the so-called Italian Second Republic (1992-2013), namely the period following the judicial inquiry Clean Hands, which caused the implosion of the previous party system. Although the end of the Second Republic is still disputed, we consider the electoral earthquake of the 2103 at the national level (Chiaramonte and De Sio 2013; Itanes 2013) to be another turn around as far as party system change is concerned. Altogether 14 elections are taken into account and grouped in electoral cycles as follows: first cycle 1990 (elections May 6, 1990); second cycle 1995 (April 23, 1995); third cycle 2000 (April 16, 2000 and November 11, 2001); fourth cycle 2005 (April 3, 2005, April 17, 2005 and November 5, 2006); fifth cycle 2010 (December 14, 2008; March 28, 2010; and October 16, 2011); sixth cycle 2015 (February 24, 2013; November 17, 2013; May 25, 2014; November 23, 2014; and May 31, 2005). ItalyItaly Regional Elections in Italian Ordinary Regions during 1995-2015 period Each election held in Ordinary Regions has been includedEach election held in Ordinary Regions has been included Free access (without registration) - The research data can be downloaded directly by anyone without further limitations. CC BY-NC-SA 4.0: Namensnennung - Nicht kommerziell – Weitergabe unter gleichen Bedingungen (http://creativecommons.org/licenses/by-nc-sa/4.0/deed.de)Freier Zugang (ohne Registrierung) - Die Forschungsdaten können von jedem direkt heruntergeladen werden. CC BY-NC-SA 4.0: Namensnennung - Nicht kommerziell – Weitergabe unter gleichen Bedingungen (http://creativecommons.org/licenses/by-nc-sa/4.0/deed.de) http://dbkapps.gesis.org/dbkoai/oai.asp oai:dbk.gesis.org:SDN/10.7802_1484 2023-03-11 ddi:codebook:2_5