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Institutional insulation and negotiated gradualism: a political-economy analysis of the Los Angeles–Long Beach–Shanghai green shipping corridor
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DOI：10.3389/fmars.2026.1902075.png)
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Abstract
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IntroductionMaritime shipping accounts for approximately 2.9% of global anthropogenic greenhouse-gas emissions; and green shipping corridors have emerged as route-specific governance experiments intended to accelerate decarbonization. This paper examines how stakeholders sustain cooperation on a zero-emission shipping corridor under acute geopolitical tension.MethodsUsing a qualitative case study of the Los Angeles-Long Beach-Shanghai Green Shipping Corridor between 2022 and 2025; the analysis draws on collective-action theory; regime-formation theory; and complex interdependence; and engages recent scholarship on polycentric and multi-stakeholder ocean governance to develop two analytical concepts; institutional insulation and negotiated gradualism. Evidence is drawn from a documented corpus of partnership reports; port and government records; primary trade-policy documents; and independent regulatory; corporate; and trade sources; key empirical claims are triangulated against non-partnership sources and flagged where they rest on partnership reporting alone.ResultsSubnational and industry actors sustain operational cooperation even as U.S.-China relations deteriorate; achieving early milestones in shore-power deployment; alternative-fuel voyages; and standardized reporting; while fuel-price volatility; infrastructure-financing gaps; and unequal bargaining power confine activity to demonstration scale. Institutional insulation describes the deliberate channeling of cooperation into bounded technical workstreams to shield progress from national-level geopolitical disruption; with observable indicators that distinguish it from cooperation that merely happens to remain technical and the conditions under which it is expected to fail. Negotiated gradualism characterizes the pattern whereby stakeholders sustain incremental commitments through mutual commercial interest while structural asymmetries in bargaining power; cost distribution; and fuel-market conditions constrain systemic transformation.DiscussionTo the authors’ knowledge; the paper provides the first political-economy analysis of a green shipping corridor operating under acute geopolitical tension; and it specifies scope conditions under which its mechanisms are expected to travel to other cases.
Keywords:
collective action
political economy
maritime decarbonization
polycentric governance
green shipping corridors
institutional insulation
policy uncertainty
regime formation
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