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Government intervention, political connections, and stock performance: an event study from Argentina

Published online by Cambridge University Press:  21 October 2025

Marcelo Cano-Kollmann*
Affiliation:
Management Department, Ohio University, Athens, OH, USA
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Abstract

This paper examines whether political connections can protect firms from losses resulting from a government’s adverse policies. I explore this question in the context of Argentina’s partial nationalization of publicly traded firms in 2008–2011, resulting from the counter-reform of the country’s pension system. I find that partially nationalized firms in Argentina incurred much greater losses than firms in a control group. Among the partially nationalized firms, those with political connections were hurt less than non-connected firms. However, political connections lost all their value in firms where the government acquired a very large ownership stake. I also find that foreign ownership offered firms no protection against losses stemming from partial nationalization. These results suggest that in an unfavorable policy environment, firms may not be able to fully rely on political connections for protection.

Information

Type
Research 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 on behalf of Vinod K. Aggarwal
Figure 0

Table 1: Comparison between Argentine and Chilean pension systems

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Table 2: List of firms and government stakes.20

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Table 3: List of event windows

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Table 4: Descriptive statistics and correlations

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Table 5: Stock market reactions to pension system renationalization and subsequent events

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Table 6: Linear regression analysis for cumulative standard abnormal returns (events 1, 2, and 3)

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Figure 1. Cumulative abnormal returns, politically vs. nonpolitically connected firms*. * Politically connected firms: those with scores above the median of Political Connectedness.

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Figure 2. Cumulative abnormal returns by firm size*. * Larger and Smaller firms are above and below the median for size, respectively.

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Figure 3. Cumulative abnormal returns by firm nationality.

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Table 7: List of political connections by firm

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Figure 4. Joint effect of political connectedness and stake on cumulative abnormal returns.