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Main Authors: Kovács, Tímea, Petróczy, Dóra Gréta, Pásztor, Gábor
Format: Preprint
Published: 2025
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Online Access:https://arxiv.org/abs/2508.08914
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author Kovács, Tímea
Petróczy, Dóra Gréta
Pásztor, Gábor
author_facet Kovács, Tímea
Petróczy, Dóra Gréta
Pásztor, Gábor
contents As of 2022, the European Union has taken several steps regarding enlargement. We focus on the accession of countries with which the Union is actively negotiating membership. This is examined under two enlargement scenarios: first, the enlargement along the lines of the Western Balkan countries, and second, the accession of a trio (Ukraine, Moldova, and Georgia) to the already enlarged Union. We determine the a priori power of the member states based on the Banzhaf and Shapley--Shubik indices. Various coalitions are also assumed to assess the power and influence of member states, considering both pre- and post-enlargement scenarios. We found a rare case when the two indices give different rankings. In the case of the Western Balkan countries' accession, the smaller population member states gain power, presenting an example of the new member paradox. While in a Union of 36 members, every member state loses some of their current power. However, some coalitions are better off with the EU36 enlargement than a EU33 one.
format Preprint
id arxiv_https___arxiv_org_abs_2508_08914
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle The impact of the European Union's enlargement with the Western Balkans and the Association Trio on the power of member states in the Council
Kovács, Tímea
Petróczy, Dóra Gréta
Pásztor, Gábor
General Economics
Economics
91A80, 91B12
As of 2022, the European Union has taken several steps regarding enlargement. We focus on the accession of countries with which the Union is actively negotiating membership. This is examined under two enlargement scenarios: first, the enlargement along the lines of the Western Balkan countries, and second, the accession of a trio (Ukraine, Moldova, and Georgia) to the already enlarged Union. We determine the a priori power of the member states based on the Banzhaf and Shapley--Shubik indices. Various coalitions are also assumed to assess the power and influence of member states, considering both pre- and post-enlargement scenarios. We found a rare case when the two indices give different rankings. In the case of the Western Balkan countries' accession, the smaller population member states gain power, presenting an example of the new member paradox. While in a Union of 36 members, every member state loses some of their current power. However, some coalitions are better off with the EU36 enlargement than a EU33 one.
title The impact of the European Union's enlargement with the Western Balkans and the Association Trio on the power of member states in the Council
topic General Economics
Economics
91A80, 91B12
url https://arxiv.org/abs/2508.08914