I am a Ph.D. student in Political Science at the Federal University of Pernambuco (UFPE) in Recife, Brazil. I received an M.A. in Political Science from UFPE in 2024 and a B.A. in Political Science from the same institution in 2022.
My research focuses on how international organizations process competing demands, allocate attention across issue areas, and adapt decision-making routines over time, and how these dynamics shape political outcomes such as responses to international health and security threats and institutional efficiency. To analyze these questions, I draw on computational and quantitative approaches to political science, especially network analysis and text-as-data methods. I am also interested in democratization processes and how they interact with and affect domestic and international institutions.
International RelationsInternational OrganizationsGlobal Health GovernanceUN General AssemblyUN Security CouncilComparative PoliticsDemocratizationQuantitative MethodsQualitative Methods
Selected Publication
Coalition Formation and Co-sponsorship in the United Nations Security Council
Coalition Formation and Co-sponsorship in the United Nations Security Council. In: Multilateralism and the United Nations Security Council (eds. Hosli, M. O.; Bueno, G. M. G. M.; Champawat, K.; Lopes, S. P.). 1st ed. Cham, Switzerland: Springer Nature Switzerland, 2025, v. 1, pp. 53–79. DOI: 10.1007/978-3-031-85320-3_3.
Research in Progress
Under Review
From Post-War to Pandemic: The Construction of the Human Rights and Health Agenda at the United Nations General Assembly
Under review
Processing in the United Nations Security Council
with Rodrigo Lyra (UFPE), Cecília França (UFPE), and Petra Godoy (UFPE)
Under review
Between the Ballot and the Banknote: Evidence on the Impact of Democratization on Central Bank Independence
with João Caetano Leite (IESP-UERJ), Cecília França (UFPE), Alan Cavalcanti (UFPE), Pedro Marques (UFPB), and Isabela do Canto (USP)
Under review
Working Papers
Modeling Co-sponsorship and Political Outcomes in the United Nations General Assembly
with Jamil Civitarese (New York University)
Security Council Membership and Voting Behavior in the United Nations General Assembly
with Madeleine O. Hosli (Leiden University)
Populism and Global Governance: The Effect of Populist Leadership on Public Opinion toward the United Nations
with Bruno Farias (UFPE), Daniel Daher (UFPE), Alan Cavalcanti (UFPE), and Isabela do Canto (USP)
Committee: Rafael Mesquita (advisor), UFPE; Marcelo Medeiros, UFPE; Thales de Carvalho, UERJ.
Reference: PASTICH, Rennan Loureiro. Do Pós Guerra à Pandemia : A construção da Agenda de Saúde Global na Assembleia Geral da ONU. 2025. Dissertação (Mestrado em Ciência Política) – Universidade Federal de Pernambuco, Recife, 2025.
Federal University of Pernambuco (UFPE)
2018–2022
Bachelor of Political Science
Further Education
2024
Leiden University College The Hague, Leiden University
Summer School on the European Union, the United Nations, and Global Governance
Fellowships and Funding
FACEPE Doctoral Scholarship
2025–Present
Federal University of Pernambuco
Project: Thematic Dynamics in Global Health Governance: A Comparative Analysis of Citation Networks in UN, WTO, and WHO Resolutions (2000–2023). Advisor: Rafael Mesquita de Souza Lima.
CAPES Master’s Scholarship
2023–2025
Federal University of Pernambuco
Thesis project: From Post-War to Pandemic: The Construction of the Global Health Agenda in the United Nations General Assembly. Advisor: Rafael Mesquita de Souza Lima.
Research Experience
Research assistantships under the supervision of Rafael Mesquita de Souza Lima, UFPE.
Co-Sponsorship in the United Nations General Assembly
2020–2021
Research Assistant · UFPE · FACEPE Undergraduate Research Scholarship (2021); CNPq Undergraduate Research Scholarship (2020)
The Production of Emerging Countries in the United Nations General Assembly
2019
Research Assistant · UFPE · Undergraduate Research
Teaching
Introduction to Political Science
2026–Present
Teaching Assistant during Ph.D. · Undergraduate · Instructor: Nara Pavão
International Relations Theory II
2024
Teaching Assistant during M.A. · Undergraduate · Instructor: Mikelli Ribeiro
International Relations Theory I
2023
Teaching Assistant during M.A. · Undergraduate · Instructor: Rafael Mesquita
History of Brazilian Political Thought
2022
Course Monitor · Undergraduate · Instructor: Diogo Cunha
Conference Presentations
International Conferences
ACUNS Annual Meeting
2023
How populist leaders affect public confidence in International Organizations? A quasi-experimental approach · Virtual
ACUNS Annual Meeting, Geneva, Switzerland
2022
Analysis of the COVID-19 Pandemic at the United Nations General Assembly · In person
APHA Annual Meeting and Expo
2021
Analysis of the COVID-19 pandemic theme at the United Nations General Assembly · Virtual
National Conferences
DPLST–LAC–ABRI Conference, São Paulo, Brazil
2025
From Post-War to the Pandemic: The Construction of the Human Rights and Health Agenda at the UN General Assembly · In person
1st Symposium on International Organizations (SOI–UFPE)
2025
International Organizations and the Challenges in the Contemporary Scenario: The Role of the G20 and the UN · Invited Speaker
Event Publications
Bilateral relations between Brazil, Venezuela, and Colombia from the perspective of sponsorship at the United Nations General Assembly
Poster · Loureiro, Rennan Pastich; Mesquita, Rafael · 2020
"Bilateral relations between Brazil, Venezuela, and Colombia from the perspective of sponsorship at the United Nations General Assembly." In: Proceedings of the 12th Meeting of the ABCP — Brazilian Political Science Association, João Pessoa, 2020. (In Portuguese)