**Introduction** Differential tariff rates increasingly shape competitive outcomes by redistributing market access, costs, and investment incentives across countries and sectors. Recent tariff actions — often justified on industrial policy or economic security grounds — have created clear winners and losers by origin and by position in global value chains[1]. **How differential tariffs affect competitiveness** **1.** **Country-specific tariffs have shifted competitiveness in clean energy manufacturing** When tariffs are applied selectively by country, suppliers facing lower rates gain immediate price advantages, even if underlying production costs are similar. In 2024–2025, the United States sharply increased tariffs on Chinese electric vehicles (EVs), batteries, and solar products, while imports from other economies remained subject to lower rates[2]. This widened cost differentials at the border, disadvantaging Chinese exporters while improving the relative competitiveness of suppliers from economies such as Mexico, Korea, and members of the Association of Southeast Asian Nations that were not subject to the same tariff increases[3]. **2.** **Preferential tariff treatment has reinforced near-shoring advantages in North America** Preferential tariff regimes can create structural advantages for countries integrated into regional trade frameworks, particularly when tariffs rise against external suppliers. For example, as US tariffs on selected imports from partners not in the United States-Mexico-Canada Agreement (USMCA) increased in recent years, Mexico retained tariff-free access under USMCA rules of origin. This differential treatment strengthened Mexico’s competitive position in automotive and electronics assembly, encouraging investment and sourcing shifts toward North American supply chains at the expense of higher-tariff Asian suppliers[4]. **3.** **Tariff escalation has disadvantaged upgrading in critical mineral and battery supply chains** Higher tariffs on downstream products relative to upstream inputs can lock exporters into lower value-added roles while favoring processing and assembly in importing economies. In major markets such as the United States and the European Union, applied tariffs in 2024 were markedly higher on finished EVs than on upstream inputs, including critical minerals and battery components[5]. This tariff escalation protects domestic EV assembly and incentivizes localization of final production, while constraining exporting economies’ ability to move from raw materials into higher value-added battery and vehicle manufacturing[5][6]. **Conclusion** Differential tariffs reshape competitiveness by reallocating market access, investment incentives, and value capture across countries and sectors. Country-specific tariffs, preferential regimes, and tariff escalation each advantage some producers while disadvantaging others, often reinforcing existing asymmetries in global value chains.
