By: Barthélémy Bonadio, Zhen Huo, Elliot Kang, Andrei A. Levchenko, Nitya Pandalai-Nayar, and Hiroshi Toma
Related Working Paper: Playing with blocs: Quantifying decoupling
As geopolitical tensions rise between major powers, concerns intensify over the economic implications of trade fragmentation. Policymakers worldwide are concerned that the US-China trade war, Brexit, and the breakdown of economic ties between the West and Russia are all signs of a hazardous trend toward “deglobalization.” Yet despite these challenges, global trade remained surprisingly resilient. A recent paper, Bonadio et al. (2024), presents new evidence that during this period, the global trading system reconfigured itself into distinct blocs. The authors find that, contrary to popular belief, this realignment prior to 2024 did not result in significant welfare losses. In contrast, the 2025 US tariff increases and retaliation by trade partners announced as of mid-April, are likely to raise trade barriers both within and across the pre-2024 blocs, potentially reducing welfare.
Figure 1: World Trade / GDP Ratio

The Rise of Trade Blocs
The post-2016 era has been marked by significant policy shifts that potentially threaten international trade, such as the Brexit vote, the US-China trade war, and more recently, Russia’s invasion of Ukraine and subsequent sanctions. These events have sparked concerns about the possible unraveling of globalization.
However, an analysis of global trade data shows that trade relative to economic activity has not decreased since the onset of these shocks (Figure 1). In fact, the ratio of world trade to GDP has partially reversed the downward trend that started following the Global Financial Crisis.
What explains this resilience? As Antràs (2020) and Goldberg and Reed (2023) have documented, we are not experiencing deglobalization but rather fragmentation or decoupling – a reconfiguration of trade links across the globe. As countries involved in trade conflicts disengage from each other, they ramp up trade with other partners. Table 1 confirms this pattern: even as trade between the US and China fell, both economies increased trade with the rest of the world.
Table 1: Change in Trade (2015-2023)

Measuring Bloc Formation and Its Economic Impact
Our research employs a data-driven approach to identify which countries are aligning into which trade blocs. Using bilateral trade data from 2015 to 2023, we identify decoupling patterns and quantify their economic impacts.
We categorize countries into three groups: 1) The US bloc, consisting of countries that experienced reduced trade costs with the US and increased trade costs with China, 2) The China bloc, comprising countries with heightened trade costs with the US and decreased trade costs with China, and 3) Unaligned countries, where trade costs with both the US and China moved in the same direction[PT1] . We identify revealed trade costs from observed trade flows, by running a standard gravity equation. The residual of this equation is then revealed bilateral trade costs, up to the trade elasticity. Our approach, based on observed trade flows, contrasts to alternatives where the bloc structure is imposed on the data using observations like U.N voting patterns.
In our analysis of 187 countries, we find that roughly one-quarter of countries have aligned with the US, another quarter with China, and about half remain unaligned. Russia, Saudi Arabia, Israel, and Hong Kong are clearly aligned with China, while European countries, along with India, Korea, Japan, and Singapore, are part of the US bloc.
Surprising Consequences from Decoupling
Utilizing a quantitative multi-country, multi-sector global production network model, we evaluate the economic effects of observed changes in trade costs. Contrary to the widespread belief that fragmentation reduces welfare, our findings indicate that the median country experienced a marginal increase in real income from trade cost changes between 2015 and 2023, 0.6% respectively.
Thus, the process of decoupling has not yet diminished global GDP . As expected, nonaligned countries see larger income changes (0.8%) compared to those aligned with the US or China, since they do not consistently face increased trade costs with either bloc . However, even countries within the US and China blocs generally experience small gains in real income due to trade cost changes.
This finding stems from the fact that global trade remained quite stable relative to global activity from 2015 to 2023. Lower trade flows between some countries (such as the US and China) were more than compensated by higher trade flows between others. In other words, trade data reveal no significant rise in trade costs on average, which explains the lack of a negative impact on average real GDP.
Are Countries in the “Right” Blocs?
According to the factual simulation above, most countries are not worse off in the fragmented world, as trade costs decreases within blocs more than offset trade cost increases across blocs. A natural question arises: are countries aligning with blocs based on the benefits arising from international trade? To answer this question, we conduct counterfactual exercises where we shift countries to different blocs and compare their outcomes to the baseline. Our counterfactual analysis examines whether countries would benefit economically from changing bloc alignment. Surprisingly, we find that economic self-interest does not fully account for current bloc formations. The median country in the US bloc would benefit from switching to the China bloc, and vice versa.
This suggests that geopolitical factors, rather than purely economic considerations, are influencing bloc alignment decisions. By investigating the determinants of trade changes, we find that geopolitical considerations indeed increased their role in international trade. After 2015, countries increased trade with their pre-2015 political allies (measured by UN voting patterns) at the expense of non-allies.
Policy Implications
As the global economy continues to fragment, our findings have important implications. Firstly, fragmentation need not necessarily lead to economic losses. In fact, the reconfiguration of trade in the lead up to 2023 benefited marginally most countries by allowing them to redirect trade toward partners with lower costs. Secondly, regional trade integration may offset some negative effects of cross-bloc decoupling, as evidenced by declining trade costs within blocs. Thirdly, when economic and geopolitical incentives diverge, policymakers may face complex trade-offs. Our research shows that many countries are not part of the bloc that would be economically optimal for them.
Conclusion
The reorganization of global trade into blocs results in both winners and losers, but up until 2023, most countries have marginally benefited from the observed changes in trade costs. The increased integration within blocs has compensated for the negative impacts of fragmentation between blocs.
Our research suggests that factors beyond international trade are primarily driving these bloc alignments. This indicates that policymakers should aim to balance economic opportunities with geopolitical considerations in an increasingly divided world, strategically navigating geopolitical realities alongside economic prospects. That said, the 2025 trade war is already raising trade costs within the blocs that formed prior to 2023, and therefore might offset some of the marginal welfare gains this far.
References
Aiyar, Shekhar, Andrea Presbitero, and Michele Ruta. 2023. Geoeconomic Fragmentation: The Economic Risks from a Fractured World Economy. CEPR Press.
Antràs, Pol. 2020. “De-globalisation? Global value chains in the post-COVID-19 age.” NBER Working Paper No. 28115, National Bureau of Economic Research.
Bonadio, Barthélémy, Zhen Huo, Elliot Kang, Andrei A. Levchenko, Nitya Pandalai-Nayar, Hiroshi Toma, and Petia Topalova. 2024. “Playing with blocs: Quantifying decoupling.” Working Paper.
Clayton, Christopher, Matteo Maggiori, and Jesse Schreger. 2023. “A framework for geoeconomics.” NBER Working Paper No. 31852, National Bureau of Economic Research.
Goldberg, Pinelopi K and Tristan Reed. 2023. “Is the global economy deglobalizing? If so, why? And what is next?” Brookings Papers on Economic Activity 2023 (1):347–423.
Gopinath, Gita, Pierre-Olivier Gourinchas, Andrea Presbitero, and Petia Topalova. 2024. “Changing Global Linkages: A New Cold War?” IMF Working Paper 2024-076, International Monetary Fund.