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Jonne Kamphorst

LLM Agents Grounded in Self-Reports Enable General-Purpose Simulation of Individuals
2024 · Park, Joon Sung, Zou, Carolyn Q., et al. · arXiv (Cornell University) · 50
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Field of Education and Political Behavior: Predicting GAL/TAN Voting
2024 · LIESBET HOOGHE, GARY MARKS, et al. · American Political Science Review · 37
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Too Important to Ignore? Why Ambiguity and Broad Appeals Fail With Rising Issue Salience
2021 · Jonne Kamphorst · The Journal of Politics · 26
Separated by Degrees: Social Closure by Education Levels Strengthens Contemporary Political Divides
2024 · Jona de Jong, Jonne Kamphorst · Comparative Political Studies · 18
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The limits of issue entrepreneurship: How the German Greens failed to win in 2021
2023 · Tarik Abou-Chadi, Jonne Kamphorst · Electoral Studies · 8
Correcting misperceptions of the material benefits associated with union membership increases Americans’ interest in joining unions
2024 · Jonne Kamphorst, Robb Willer · Proceedings of the National Academy of Sciences · 7
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The relevance of meritocratic beliefs for redistributive preferences increases with income
2025 · Irene Pañeda-Fernández, Jonne Kamphorst, et al. · Social Science Research · 3
Prominence over proximity? Terror attacks’ impact on party preferences
2023 · Emma Hoes, Jonne Kamphorst, et al. · European Political Science Review · 2
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Americans Favor Predistributive Over Redistributive Economic Policies
2026 · David Broska, Jonne Kamphorst, et al. · 1
Replication Data for: Get Out The Volunteer: Encouraging Diverse Political Party Activism
2026 · Kamphorst, Jonne, Larreguy Arbesu, Horacio · Harvard Dataverse · 1
Education for Mobilization: The Effects of Knowledge About Labor History on Union Support
2026 · Kamphorst, Jonne, Rahnama, Roxanne · Harvard Dataverse · 1
Is winning the first primaries of primary importance? A regression-discontinuity approach
2026 · Jonne Kamphorst, Alexander Davenport, et al. · Political Science Research and Methods · 1
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Beyond the Diploma Divide: Field of Education and Ideological Divisions among College Educated
2025 · Liesbet Hooghe, Gary Marks, et al. · SSRN Electronic Journal · 1
The Left Misunderstood: How Voters' Perceptions of What Matters to the Left Benefit the Right
2025 · Jonne Kamphorst · SSRN Electronic Journal · 1
The Left Misunderstood: How Voters’ Perceptions of What Matters to the Left Benefit the Right
2026 · Jonne Kamphorst · The Journal of Politics
Volunteer recruitment through personal calls and emails: Two field experiments with a Dutch political party: In two field experiments with Dutch party members, receiving a personal call from a party volunteer increased sign-ups for volunteer activities on the party website (combined via inverse covariance weighting) relative to the untreated control group, while email alone did not. The calling effect is similar for women and men and significantly larger for members aged 35 and under than for the 36–65 and 65-plus groups (between-age-group differences: Study 1, calls only: p = 0.011 and 0.002; Study 2, call-and-email: p = 0.023 and 0.002).
2026 · Kamphorst, Jonne · TIB Knowledge Loom
Volunteer recruitment through personal calls and emails: Two field experiments with a Dutch political party: In two field experiments with Dutch party members, receiving a personal call from a party volunteer increased sign-ups for volunteer activities on the party website (combined via inverse covariance weighting) relative to the untreated control group in Study 1 (ITT β = 0.037, p < 0.001) and Study 2 (ITT β = 0.074, p < 0.001). The call-and-email treatment also increased sign-ups in Study 2 (ITT β = 0.058, p < 0.001), whereas email alone had no effect (β = −0.009, p = 0.35). In Study 1, the complier average causal effect of the call among the 995 of 2,390 called members who answered the phone was β = 1.234 (SE 0.148, p < 0.001).
2026 · Kamphorst, Jonne · TIB Knowledge Loom
Volunteer recruitment through personal calls and emails: Two field experiments with a Dutch political party
2026 · Kamphorst, Jonne · TIB Knowledge Loom
Volunteer recruitment through personal calls and emails: Two field experiments with a Dutch political party: European Social Survey 2023-2024 data show that political volunteering differs markedly across generations and genders in the Netherlands and five other Western European countries (CH, DE, FI, GB, NO): around 12% of people born before 1965 donated to or participated in a political party or pressure group in the past 12 months, compared to just above 6% of those born after 1995, and women are significantly less likely to volunteer than men.
2026 · Kamphorst, Jonne · TIB Knowledge Loom
kamphorst-2026-1-1
2026 · Jonne Kamphorst · TIB Data Manager
Survey-Anchored Agents for Cross-Cultural LLM Simulations
2026 · Chen, Huanxing, Kamphorst, Jonne, et al. · Stanford Digital Repository
Get Out the Volunteer: Encouraging Diverse Political Party Activism
2026 · Jonne Kamphorst, Horacio Larreguy · Political Analysis
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Silicon Sample Benchmark — Tier 1 survey-agent submission: LLM personas conditioned on climate survey data (team_15, secondary-1 entry)
2026 · Kamphorst, Jonne, Chen, Huanxing, et al. · Zenodo (CERN European Organization for Nuclear Research)
Silicon Sample Benchmark — Tier 1 interview-agent submission: LLM personas conditioned on life-story interviews (team_15, primary entry)
2026 · Kamphorst, Jonne, Chen, Huanxing, et al. · Zenodo (CERN European Organization for Nuclear Research)
Silicon Sample Benchmark — Tier 3 (direct effect forecast) submission (team team_15)
2026 · Kamphorst, Jonne, Chen, Huanxing, et al. · Zenodo (CERN European Organization for Nuclear Research)
Works count: 90
Citation count: 158
H-index: 6
I10-index: 4
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