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  5. Sebastián Vallejo Vera

Sebastián Vallejo Vera

Sebastian Vallejo Vera
Assistant Professor

Contact Information
Office: SSC 7221
Tel: 519 661-2111 X 85163
E-mail: sebastian.vallejo@uwo.ca 
Professional Website Google Scholar Profile GitHub Profile

Education

PhD, University of Maryland, College Park

Research Interests

My research explores the relationship between gendered political institutions and representation, and racial identity and racism in Latin America. I am particularly interested in the gendered barriers in political institutions, and the strategic reaction of political actors when encountering these barriers. My methodological work applies novel Natural Language Processing (NLP) to a wide variety of text data, from legislative speeches to tweets, to answer substantive questions about gender, racism, and politics.

You can find a complete and updated list of my publications, working papers, and research projects at my website.

Scholarly Books (Authored & Co-Authored)

Selected Publications

  • 2026. Vallejo Vera, S., Timoneda, J. C., & Dávila Gordillo, D. Machines do see color: Using LLMs to classify overt and covert racism in text. Sociological Methods & Research, 0(0). DOI PDF Replication Material
  • 2026. Timoneda, J. C., & Vallejo Vera, S. Rolling memory: A new approach to annotation with generative LLMs in social and political research. Chinese Political Science Review, 1–15. PDF
  • 2025. Vallejo Vera, S., & Driggers, H. LLMs as annotators: The effect of party cues on labelling decisions by large language models. Nature: Humanities and Social Sciences Communications, 12(1), 1–11. PDF
  • 2025. Timoneda, J. C., & Vallejo Vera, S. BERT, RoBERTa or DeBERTa? Comparing performance across Transformer models in political science text. The Journal of Politics, 87(1), 347–364. PDF Replication Material
  • 2025. Timoneda, J. C., & Vallejo Vera, S. Behind the mask: Random and selective masking in Transformer models applied to specialized social science texts. PLOS ONE, 20(2), e0318421. PDF Replication Material
  • 2025. Alemán, E., Barnes, T., Micozzi, J. P., & Vallejo Vera, S. Gender, institutions, and legislative speeches. Comparative Politics, 57(2), 219–241. DOI PDF Replication Material
  • 2024. Alemán, E., Valdivieso Kastner, P., & Vallejo Vera, S. Speech targeting and constituency representation in open-list electoral systems. Electoral Studies, 92, 102865. DOI PDF
  • 2024. Hellmueller, L., Camaj, L., Vallejo Vera, S., & Lindner, P. The impact of journalistic cultures on social media discourse: US primary debates in cross-lingual online spaces. Digital Journalism, 1–21. DOI PDF
  • 2023. Vallejo Vera, S. Rage in the machine: Activation of racist content in social media. Latin American Politics and Society, 65(1), 74–100. DOI PDF
  • 2022. Alemán, E., Micozzi, J. P., & Vallejo Vera, S. Congressional committees, electoral connections, and legislative speech. Political Research Quarterly. DOI PDF
  • 2022. Abad, A., Aldaz Peña, R., Davila Gordillo, D., & Vallejo Vera, S. An unwelcomed deja-vu: Ecuadorian politics in 2021. Revista de Ciencia Política, 42(2), 281–308. DOI PDF
  • 2022. Vallejo Vera, S., & Gómez Vidal, A. The politics of interruptions: Gendered disruptions of legislative speeches. The Journal of Politics, 84(3), 1384–1402. DOI PDF Replication Data Media