Data
I have contributed to several projects harmonizing existing survey data and creating new datasets on party competition, social media activity, and environmental attitudes. The datasets below are openly available for reuse.
Political discourse
What parties post on social media and what governments say at the UN: how much, and about which issues.
- PartySOME: Political Parties on Social Media2025–2026
Two linked releases on parties' social media, to the end of 2023: posting volume and timing of 498 parties in 37 countries on Facebook, Instagram, Twitter and YouTube (PartySOME), and monthly issue agendas of 219 parties in 18 European countries on Facebook, Twitter and Instagram (PartySOME II).
Citation
Jan, M., & Sattelmayer, L. (2025). PartySOME: A comprehensive dataset on political parties' SOcial MEdia activity. Party Politics.
Jan, M., & Sattelmayer, L. (2026). Issue Competition on Social Media: A New Comparative Dataset on Parties' Issue Agendas. West European Politics.
- Executive Climate Change Attention (ECCA)2026
Share of each country's annual speech at the UN General Assembly devoted to climate change, for 195 countries since 1985, measured with a fine-tuned transformer model.
Citation
Grossman, E., & Jan, M. (2026). Executive Climate Change Attention: Toward an Indicator of Comparative Climate Change Attention. Global Environmental Politics, 26(2), 137–150.
Public opinion on climate change
Survey data on French citizens' environmental attitudes and behaviours.
- Baromètre Écologie Environnement (ELIPSS, 2023–2025)2023–2025
Repeated ELIPSS survey of French citizens' environmental attitudes and behaviours, in three waves (2023, 2024, 2025).
Citation
Éric Pautard; Nicolas Sauger; Luc Rouban; Maël Ginsburger; Emiliano Grossman; Malo Jan; Luis Sattelmayer; Théodore Tallent; Lucien Thabourey; Simon Audebert, 2024, 'Baromètre Écologie Environnement (ELIPSS 2023)', https://doi.org/10.21410/7E4/OH0RKI, data.sciencespo, V3.
Éric Pautard; Nicolas Sauger; Luc Rouban; Maël Ginsburger; Emiliano Grossman; Malo Jan; Luis Sattelmayer; Théodore Tallent; Lucien Thabourey; Simon Audebert, 2025, 'Baromètre Écologie Environnement - vague 1 (ELIPSS 2024)', https://doi.org/10.21410/7E4/2NWBPE, data.sciencespo, V3.
Éric Pautard; Nicolas Sauger; Luc Rouban; Maël Ginsburger; Emiliano Grossman; Malo Jan; Luis Sattelmayer; Théodore Tallent; Lucien Thabourey; Simon Audebert, 2026, 'Baromètre Écologie Environnement - vague 2 (ELIPSS 2025)', https://doi.org/10.21410/7E4/FHGZ3H, data.sciencespo, V4.
Electoral surveys
French election studies, from harmonised historical surveys to the 2024 European elections.
- Les élections européennes 2024 en France (ELIPSS 2024)2024
Survey data on the 2024 EU elections in France.
Citation
Persico, Simon; Gougou, Florent; Grossman, Emiliano; Jan, Malo, 2024, 'Les élections européennes 2024 en France (ELIPSS)', https://doi.org/10.21410/7E4/TTMWTD, data.sciencespo, V1. - Base de données comparatives des enquêtes électorales françaises (1958-2017)2022
Harmonization project led by the CDSP at Sciences Po to compare French electoral surveys from 1958 to 2017
Citation
JAN, Malo; MARIE, Lucie; SAUGER, Nicolas, 2023, 'Base de données comparatives des enquêtes électorales françaises (1958-2017)', https://doi.org/10.21410/7E4/TSQKNX, data.sciencespo, V3