Dataset of Electoral Volatility in the European Parliament elections since 1979

Data source: Emanuele, Angelucci, Marino, Puleo and Vegetti

Go to the original dataset webpage

Description:

This dataset provides data on electoral volatility and its internal components in the elections for the European Parliament (EP) in all European Union (EU) countries since 1979 or the date of their accession to the Union. It also provides data about electoral volatility for both the class bloc and the demarcation bloc. This dataset will be regularly updated so as to include the next rounds of the European Parliament elections.

Last updated by source: 2019-06-22

Dataset type: Time-Series
Dataset level: Country

Citation:

When using this dataset, please cite as:
• Emanuele, V. (2019). Dataset of electoral volatility in the european parliament elections since 1979 (v2.0.0). In Italian Political Science Review. https://doi.org/10.7802/1905
• Emanuele, V., Angelucci, D., Marino, B., Puleo, L., & Vegetti, F. (2020). The congealing of a new cleavage? The evolution of the demarcation bloc in europe (1979–-2019). Italian Political Science Review, 3, 1–20. https://doi.org/10.1017/ipo.2020.19



Variables in this dataset:

   Electoral Volatility in the EP - Parties above 1%
QoG Code: evep_altv

Electoral volatility in the European Parliament, caused by vote switching between parties that enter or exit from the party system caused by vote switching between existing parties, namely parties receiving at least 1% of the national share in both elections under scrutiny.

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   Net change in the agg. vote share for all parties in Class Bloc (EP)
QoG Code: evep_classbloc

Net change in the aggregate vote share for all parties included in the Class Bloc. For the definition of the class bloc and the identification of parties included in such bloc, the author relies on Bartolini and Mair (1990) and Bartolini (1983; 2000). This includes 'those parties which are the historical product of the structuring of the working-class movement' (Bartolini and Mair 1990 [2007], 46). Full list of parties in the class bloc can be found in the original codebook.

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   Net change in the agg. vote share for all parties in Demarcation Bloc (EP)
QoG Code: evep_dembloc

Net change in the aggregate vote share for all parties included in the Demarcation Bloc. Those political parties that defend anti-EU, anti-immigration and economically protectionist policies are included in the demarcation bloc. Full list of parties in the demarcation bloc can be found in the original codebook.

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   Electoral Volatility in the EP - Parties below 1%
QoG Code: evep_othv

Electoral volatility in the European Parliament, caused by vote switching between parties falling below 1% of the national share in both the elections at time t and t+1. It is important to clarify that this category is not computed by aggregating the scores of each party falling below 1% and then comparing the overall sum at time t and t+1. Conversely, each party's volatility is counted separately - up to a specification of 0.1% - and then added to the calculation of evep_othv. This choice has been made to avoid underestimation of Total Volatility but at the same time to maintain a distinction between parties above 1% and parties below 1% for the calculation of the two components of evep_regv and evep_altv.

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   Electoral Volatility in the EP - Parties entering/exiting party system
QoG Code: evep_regv

Electoral volatility in the European Parliament, caused by vote switching between parties that enter or exit from the party system. A party is considered as entering the party system where it receives at least 1% of the national share in election at time t+1 (while it received less than 1% in election at time t). Conversely, a party is considered as exiting the part system where it receives less than 1% in election at time t+1 (while it received at least 1% in election at time t).

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   Electoral Volatility in the EP - Total
QoG Code: evep_tv

Total electoral volatility in the party system, given by the sum of the previous measures: evep_regv + evep_altv + evep_othv = evep_tv.

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