Datasets to Measure Polarization

Comparative Study of Electoral Systems


Description

The Comparative Study of Electoral Systems (CSES) is a collaborative program of election research teams from around the world. The CSES covers a wide range of topics with a focus on the behavior and attitudes of respondents at times of national elections, such as voting and turnout. CSES designs a core questionnaire that is regularly included in many academic national election surveys.

Launched in 1996, the CSES has included five modules to date, covering topics such as citizens’ views of political elites, representation and accountability, and the impact of electoral institutions. With regard to polarization, the CSES questionnaire includes several items that can be used to measure ideological polarization at the elite and mass levels and affective polarization at the mass level.

Items

Items that can be found in this dataset:

Measures

Measures that use this dataset:

MeasurePolarization
Affective Polarization Indexaffective, mass, vertical
(Weighted) mean distance from the most-liked partyaffective, mass, vertical
Party Dyads and In-Out-Party Differencesideological, affective, mass, vertical
Party-System Extremismideological, elite
CSES Polarization Indexideological, elite, mass
Standard Deviationideological, elite, mass
(Weighted) Spread of like-dislike scoresaffective, mass, vertical
Weighted Varianceideological, elite

Visualization

Use cases

Publications that use this dataset:

TitleAuthors
Can’t We All Just Get Along?
  • Adams et al. (2023)
The Activists Who Divide Us
  • Amitai (2023)
Camps, not just parties
  • Bantel (2023)
A regional perspective to the study of affective polarisation
  • Bettarelli et al. (2023)
Cleavage politics, polarisation and participation in Western Europe
  • Borbáth et al. (2023)
Cross-Country Trends in Affective Polarization
  • Boxell et al. (2022)
Missing Links in Party-System Polarisation
  • Curini and Hino (2012)
The Quantity and the Quality of Party Systems
  • Dalton (2008)
Modeling ideological polarisation in democratic party systems
  • Dalton (2021)
Party System Polarisation and Electoral Behavior
  • Dassonneville and Çakır (2021)
The Two-Way Effects of Populism on Affective Polarization
  • Davis et al. (2024)
Party-System Extremism in Majoritarian and Proportional Electoral Systems
  • Dow (2011)
Gender and affective polarization
  • Han (2025)
Fragmented foes
  • Harteveld (2021)
Affective polarization and the salience of elections
  • Hernández et al. (2021)
The mobilising effect of political choice
  • Hobolt and Hoerner (2019)
Party Polarisation and Mass Partisanship
  • Lupu (2015)
The Bipolar Voter
  • Moral (2017)
On the relationship between party polarisation and citizen polarisation
  • Moral and Best (2023)
The relationship between affective polarisation and democratic backsliding
  • Orhan (2022)
Fear and loathing across party lines (also) in Europe
  • Reiljan (2020)
Patterns of Affective Polarisation toward Parties and Leaders across the Democratic World
  • Reiljan et al. (2023)
Overlapping polarization
  • Riera and Madariaga (2023)
Party-System Polarization and Individual Perceptions of Party Differences
  • Rossteutscher and Stövsand (2024)
Exploring differences in affective polarization between the Nordic countries
  • Ryan (2023)
Affective polarisation in multiparty systems
  • Wagner (2021)
Meaningful choices, political supply, and institutional effectiveness
  • Wessels and Schmitt (2008)