Electoral Litigation in Political Campaigns

66 Pages Posted: 14 Apr 2025 Last revised: 17 Apr 2026

See all articles by Moya Chin

Moya Chin

affiliation not provided to SSRN

Guilherme Lambais

Center for Research in Economics and Comparative Development, Lusiada University of Lisbon

Henrik Sigstad

BI Norwegian Business School

Date Written: April 17, 2026

Abstract

What role do lawsuits play in elections? We assemble a new dataset covering over 27,000 electoral lawsuits matched to detailed information on more than 19,000 mayoral candidates in Brazil. 30 percent of mayoral candidates are involved in election-related lawsuits, and they spend 11 percent of their campaign funds on lawyers. Candidates filing lawsuits rarely succeed in disqualifying opponents or annulling elections. Instead, the true motivation might be to influence voters: Most lawsuits target runner-ups, are filed right before the election, are judicially weak, and are featured in media campaigns. Using polling data and exact filing dates, we find minimal average effects of lawsuits on vote intentions and can rule out large adverse effects on defendants. The results suggest that electoral litigation is often used strategically in campaigns even when its average electoral effects are limited.

Keywords: electoral courts, negative campaigning

JEL Classification: K16, K41, D72

Suggested Citation

Chin, Moya and Lambais, Guilherme and Sigstad, Henrik, Electoral Litigation in Political Campaigns (April 17, 2026). Available at SSRN: https://ssrn.com/abstract=5183038 or http://dx.doi.org/10.2139/ssrn.5183038

Moya Chin

affiliation not provided to SSRN ( email )

Guilherme Lambais

Center for Research in Economics and Comparative Development, Lusiada University of Lisbon ( email )

Rua da Junqueira
188
Lisbon, 1349-001
Portugal

HOME PAGE: http://gbrlambais.github.io

Henrik Sigstad (Contact Author)

BI Norwegian Business School ( email )

Nydalsveien 37
Oslo, 0484
Norway

HOME PAGE: http://https://hsigstad.github.io/

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