103,470 rated or chosen profiles from 10,347 respondents, in up to 5 tasks of 2 profiles varying on 5 attributes.

About this table

Description	YouGov respondents in Denmark, Germany, Hungary, Italy, Romania and the UK (Feb-Mar 2022; n=10,347) each made 5 forced choices between two hypothetical parliamentary candidates varying in institutional and extra-institutional experience, reason for running, and migration and climate positions, and rated each candidate 1-7.
Reference	Mercea, D., & Santos, F. G. (2025). Policy over protest: Experimental evidence on the drivers of support for movement parties. Perspectives on Politics, 23(3), 901-923.
DOI	10.1017/S1537592724001439
Licence	CC0 1.0
Source data	https://doi.org/10.7910/DVN/CBKZL1

Notes

Conjoint table (irw_conjoint). choice = "If you had to choose between them, which candidate do you prefer?" (forced, no opt-out); rating = approval of each candidate, 1 = strongly disapprove to 7 = strongly approve. Six countries pooled (cov_country); attribute text is the English instrument with [COUNTRY] in the migration levels, since the national-language labels in the deposit are truncated. Levels randomized without restrictions; attribute order randomized once per respondent (not recorded). N = 10,347 as in the article.

These notes describe the source data, which the IRW reproduces as released. All notes are listed on the Data Notes page.

Size and shape

Respondents	10,347
Rows (one per respondent, task and profile)	103,470
Tasks per respondent (most)	5
Profiles per task	2
Attributes	5
Tasks with no profile chosen	0

Design

Topic	candidate choice
A profile represents	person
Country	DK, DE, HU, IT, RO, GB
Language shown	da, de, hu, it, ro, en
Language of stored levels	en
Task order	recorded in the deposit
Profile position	recorded in the deposit

Outcomes:

choice	If you had to choose between them, which candidate do you prefer? [choice, forced]
rating	How much do you approve or disapprove of this candidate? (paraphrase) [rating, 1 (Strongly disapprove) to 7 (Strongly approve)]

Columns

attr_environment_positionattr_extrainstitutional_experienceattr_institutional_experienceattr_migration_positionattr_reason_for_runningchoicecov_countrycov_past_votecov_survey_weightidprofileratingtask

The layout (one row per respondent, task and profile; choice/rating outcomes; attr_ columns holding each attribute level as displayed) is defined in the IRW conjoint standard. What the outcomes asked is under Design above.

Get the data

Download CSVno account needed Browse on Redivisexplore and query Croissant metadataHugging Face, Kaggle, OpenML

Or load it directly in R or Python (both need a free Redivis account; the first call opens a browser to sign in):

# R
install.packages("remotes")
remotes::install_github("itemresponsewarehouse/Rpkg")
library(irw)
df <- irw_fetch("mercea_2025_movement_parties", source = "conj")

# Python
pip install irw

import irw
df = irw.fetch("mercea_2025_movement_parties", source="conj")

How to cite

@article{Mercea_2024, title={Policy over Protest: Experimental Evidence on the Drivers of Support for Movement Parties}, volume={23}, ISSN={1541-0986}, url={http://dx.doi.org/10.1017/S1537592724001439}, DOI={10.1017/s1537592724001439}, number={3}, journal={Perspectives on Politics}, publisher={Cambridge University Press (CUP)}, author={Mercea, Dan and Santos, Felipe G.}, year={2024}, month=Nov, pages={901–923} }

Version and provenance

IRW version	v584
Redivis dataset	irw_conjoint v4.2
Redivis dataset DOI	10.57761/qkye-q530
Manifest pin for this IRW version	v4.2
Metadata source	irw_meta v44.0