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Trust in the Judiciary and Partisan Reactions to Judicial Checks: Evidence from Argentina

Published online by Cambridge University Press:  10 October 2025

Martín Gandur*
Affiliation:
Department of Political Science, Florida State University, Tallahassee, FL, USA
*
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Abstract

How do citizens evaluate the judiciary in the wake of politically salient rulings? I argue that judicial checks on the government shape citizens’ attitudes about judicial institutions at large, but these effects are driven by instrumental considerations, namely partisanship. In particular, my account suggests that judicial checks – as specific instances of interbranch conflict – provide citizens with instrumental information that shapes their beliefs about the broader judiciary. Thus, I hypothesize that court rulings limiting the government’s power will undermine support for the judiciary among individuals aligned with the incumbent, but increase support among opposition sympathizers. I test these expectations by exploiting the timing of two judicial decisions in Argentina (enacted by a lower court and the Supreme Court) that invalidated a highly salient judicial reform promoted by the government in 2013. Using data from a survey fielded before and after the court rulings, I show that the decisions significantly decreased government supporters’ trust in the judiciary, while opposition supporters increased their trust only following the Supreme Court ruling. Moreover, suggestive evidence provides support for the mechanism proposed by my account – that judicial checks expose citizens to information that is primarily instrumental. This article contributes to our knowledge of the determinants of public support for judicial institutions involved in interbranch conflicts.

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Article
Creative Commons
Creative Common License - CCCreative Common License - BY
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution and reproduction, provided the original article is properly cited.
Copyright
© The Author(s), 2025. Published by Cambridge University Press
Figure 0

Figure 1. Google trends search activity.Note: The figure uses Google Trends data to plot search interest in the term ‘Judicial Council’ (Consejo de la Magistratura). The data were obtained using the gtrendsR package in R (Massicotte and Eddelbuettel 2022). See SI B4 for more information on how Google Trends collects and measures search activity.

Figure 1

Figure 2. Distribution of respondents during the 2013 Latinobarómetro survey.Note: The figure shows the distribution of Latinobarómetro respondents by date of interview. The dashed lines mark the date of the lower court and Supreme Court rulings.

Figure 2

Figure 3. Trust in the judiciary.Note: The panels show the distribution of the binary and ordinal measures of the outcome (Trust in the Judiciary) across Latinobarómetro respondents.

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Table 1. Covariate balance across conditions

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Table 2. Main results

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Figure 4. Heterogeneous effects of the court rulings.Note: The panels show the expected effect (first difference) of the lower court (white circle) and Supreme Court (black triangle) rulings on trust in the judiciary among government supporters and opposition supporters. The vertical axis indicates the first difference in the outcome following each judicial ruling. The panels are based on the analyses presented in Table 2: models 1 and 3 (OLS, left), models 2 and 5 (EB+WLS, middle), and models 3 and 6 (GM+WLS, right). Thick and thin lines correspond to 90% and 95% confidence intervals, respectively.

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Figure 5. Placebo tests.Note: The panels show the effect of the lower court and Supreme Court rulings on different outcomes across government and opposition supporters. See SI G2 for information about these outcome items. The top panel plots the coefficient on the Court ruling x Government supporter interaction (lower court, gray; Supreme Court; black) with respect to each outcome. The bottom panel plots the first differences in each outcome (lower court, gray; Supreme Court, black) among government supporters (triangles) and opposition supporters (circles). The panels are based on linear models using entropy balance weights. Thick and thin lines correspond to 90 per cent and 95 per cent confidence intervals, respectively.

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Figure 6. Supreme Court ruling effect by newspaper frequency and political interest.Note: The panels show the expected effect (first difference) of the Supreme Court ruling on trust in the judiciary across values of log (newspaper frequency + 1) (left panel) and political interest (right panel) among opposition supporters (solid line) and government supporters (dotted line). The panels are based on analyses employing genetic matching weights and the extensive set of covariates. Lighter and darker shaded areas indicate 95 per cent and 90 per cent confidence intervals, respectively.

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