TY - RPRT AU - Levi, Eugenio AU - Bayerlein, Michael AU - Grimalda, Gianluca AU - Reggiani, Tommaso G. TI - Narratives of Migration and Political Polarization: Private Preferences, Public Preferences and Social Media PY - 2025/Mar/ PB - Institute of Labor Economics (IZA) CY - Bonn T2 - IZA Discussion Paper IS - 17749 UR - https://www.iza.org/publications/dp17749 AB - We study how preferences for migration-related narratives differ between private and public contexts and how social media fuel opinion polarization. Using a German representative sample (n=1,226), we found that individuals, especially from the left and center, avoided publicly endorsing anti-migration narratives. In an experiment on Twitter (n=19,989) we created four Twitter profiles, each endorsing one of the narratives. Far-right users exhibited markedly different engagement patterns. While initial public endorsements, measured by follow-back rates, aligned with private preferences, social media interactions amplified support for the most hostile and polarizing narrative. We conclude that social media significantly distort private preferences and amplify polarization. KW - immigration KW - narratives KW - political polarization KW - economic reciprocity KW - survey experiment KW - field experiment KW - group identity KW - social media KW - Twitter ER -