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Muscle Matters: An Integrationist Turn in Transatlantic Finance

Published online by Cambridge University Press:  15 August 2025

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Abstract

After the Great Financial Crisis of 2008, the United States (U.S.) and the European Union (EU) issued new domestic rules across a variety of financial services. Different politics and policy-making processes generated regulatory incompatibilities, and conflicts emerged as each side insisted the other adapt to its approach. Yet our original data covering eleven sub-sectors show that in a predominant cluster of cases, the two jurisdictions had by 2020 made adjustments and adopted integrationist regulation, which fosters cross-jurisdictional interoperability for financial companies through harmonization (increasing similarity and compatibility) or deference (accepting the regulation of other jurisdictions). The pattern has broad and surprising implications for the future of global finance in an era of rising economic nationalism and populist politics. Why, then, did Washington and Brussels move beyond the standoffs? What accounts for the integrationist turn? Our novel explanation features a “mutual accommodation” causal mechanism driven by the development in both jurisdictions of “border-policing” capacities, builds on a new generation of IPE research that is attentive to complexity and temporal process in accounting for global governance outcomes, and provides a pathway for qualitative researchers seeking to balance many new methodological and transparency demands.

Information

Type
Special Section: International & Comparative Political Economy
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 (http://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 American Political Science Association
Figure 0

Table 1 Conceptualization and general coding guidelines for integrationist regulation

Figure 1

Table 2 Eleven areas of U.S. and EU financial regulation, by level of integrationism for 2014 and 2020

Figure 2

Figure 1 An integrationist turn** Eleven areas of U.S. and EU financial regulation, classified as less (light blue or grey) or more (dark blue or grey) integrationist for 2014 and 2020.

Figure 3

Table 3 Pre and post-crisis financial regulatory stringency in the U.S. and the EU*

Figure 4

Figure 2 The development of border-policing capacities** U.S. and EU border-policing capacities, classified as No (white), In part (light blue or grey) or Yes (dark blue or grey) for pre-2008 and post-2008. Derived from Posner and Quaglia (2023).