QoG Data

New Parties and Party System Innovation in Western Europe

This dataset identifies and lists all the new parties emerged in Western Europe since 1945 and provides data about party system innovation, defined as the aggregate level of 'newness' recorded in a party system at a given election. Data are based on parliamentary elections (lower house) of 20 Western European countries since 1945. This dataset covers the entire universe of Western European elections held after World War II under democratic regimes. Data for Greece, Portugal and Spain have been collected after their democratizations in the 1970s.

Dataset type

Time-Series

Dataset level

Country

Last updated by source

2024-07-08

Citation

When using this dataset, please cite as:

• Emanuele, V. (2016). Dataset of new parties and party system innovation in western europe since 1945. Italian Center for Electoral Studies. https://doi.org/10.7802/1363

@misc{psi1,
 author = {Emanuele, Vincenzo},
 doi = {10.7802/1363},
 last_updated = {2024-09-18},
 publisher = {Italian Center for Electoral Studies},
 title = {Dataset of New Parties and Party System Innovation in Western Europe since 1945},
 url = {http://www.vincenzoemanuele.com/dataset-of-electoral-volatility.html},
 year = {2016}
}

Variables in this dataset

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Cummulative Party System Innovation

QoG code: psi_cpsi1

Cumulative Party System Innovation: sum of the vote share received by non-founder parties in each election. A party is considered as a founder if it has received at least 1% of the national vote share ...

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Cummulative Party System Innovation of a second election in a year

QoG code: psi_cpsi2

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Exact date of the election

QoG code: psi_edate1

Exact date of the election

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Exact date of the second election in a year

QoG code: psi_edate2

Exact date of a second election in a same year

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Party System Innovation (overall vote share of new parties in given election)

QoG code: psi_psi1

Party System Innovation: overall vote share of new parties in a given election. It is calculated at time t with respect to time t-1 (namely, PSInn is calculated with respect to the status quo establis ...

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Party System Innovation of a second election in a year

QoG code: psi_psi2

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