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Hager, Anselm ORCID: 0000-0003-4268-1759, Hensel, Lukas ORCID: 0000-0002-4962-2885, Hermle, Johannes ORCID: 0000-0003-0852-3597 and Roth, Christopher ORCID: 0000-0003-2806-7402 (2022). Political Activists as Free-Riders: Evidence from a Natural Field Experiment. Discussion Paper.
Hager, Anselm ORCID: 0000-0003-4268-1759, Hensel, Lukas ORCID: 0000-0002-4962-2885, Hermle, Johannes ORCID: 0000-0003-0852-3597 and Roth, Christopher ORCID: 0000-0003-2806-7402 (2021). Group Size and Protest Mobilization across Movements and Countermovements. Discussion Paper.