Ei ole eesti keeles kättesaadav
Bernardo De Castro Martins
- 13 November 2025
- WORKING PAPER SERIESDetails
- Abstract
- This paper introduces a novel methodology to enhance the granularity of Inter-Country Input-Output (ICIO) tables. While our general methodology can be applied to any products of interest, we show that the well-documented distortions caused by sectoral aggregation in ICIO tables are particularly pronounced for products with a low substitutability, such as those essential to the green transition (e.g. electric batteries, rare earths). We therefore apply our framework to construct a disaggregated ICIO table that singles out 129 products essential to the energy transition. We then simulate a hypothetical scenario of an East-West supply chain decoupling in green products through a multi-country multi-sector model calibrated with our tailored disaggregated ICIO table. Results reveal substantial economic costs: welfare losses reach 3% and trade between blocs contracts by 20%, even when accounting for trade diversion through neutral countries. We finally quantify how the green supply chain decoupling increases the intensities of greenhouse gas emissions, highlighting how trade barriers on green sectors affect both economic efficiency and climate objectives.
- JEL Code
- C67 : Mathematical and Quantitative Methods→Mathematical Methods, Programming Models, Mathematical and Simulation Modeling→Input?Output Models
F13 : International Economics→Trade→Trade Policy, International Trade Organizations
F18 : International Economics→Trade→Trade and Environment
F51 : International Economics→International Relations, National Security, and International Political Economy→International Conflicts, Negotiations, Sanctions
Q48 : Agricultural and Natural Resource Economics, Environmental and Ecological Economics→Energy→Government Policy
- 19 December 2024
- OCCASIONAL PAPER SERIES - No. 365Details
- Abstract
- In light of recent global economic and geopolitical shocks threatening trade openness, this report aims to shed light on geoeconomic fragmentation and develops a rich set of new tools to assess its economic effects and implications for central banks. The report shows that, although global trade integration has largely withstood recent disruptions and the rise of inward-looking policies, selective decoupling between few trading partners (United States vis-à-vis China, western economies vis-à-vis Russia) and for specific products (such as advanced technologies) is occurring. Survey data show that, although European firms are reorganising supply chains critical foreign dependencies persist. A firm-level stress test reveals that sudden disruptions in the supply of critical inputs from high-risk countries would lead to significant, albeit very heterogeneous, economic losses across firms, regions and sectors. Addressing foreign dependencies with broad-based protectionism policies, however, is self-defeating. In an extreme counterfactual scenario involving prohibitive and across-the-board trade barriers between geopolitical blocs, global GDP could decline by up to 9% coupled with an increase in global inflation of 4 percentage points in the first year, with the impact persisting for at least five years. It is conceivable that trade fragmentation will unravel over the course of a number of years, with supply disruptions becoming more frequent and severe than in the past. If this process should ultimately lead to a less interconnected global economy, countries might suffer from increased volatility and price pressures, as shocks cannot be easily diversified away through trade. [...]
- JEL Code
- F13 : International Economics→Trade→Trade Policy, International Trade Organizations
F14 : International Economics→Trade→Empirical Studies of Trade
F51 : International Economics→International Relations, National Security, and International Political Economy→International Conflicts, Negotiations, Sanctions
F52 : International Economics→International Relations, National Security, and International Political Economy→National Security, Economic Nationalism
F61 : International Economics→Economic Impacts of Globalization→Microeconomic Impacts
F62 : International Economics→Economic Impacts of Globalization→Macroeconomic Impacts
E31 : Macroeconomics and Monetary Economics→Prices, Business Fluctuations, and Cycles→Price Level, Inflation, Deflation
E50 : Macroeconomics and Monetary Economics→Monetary Policy, Central Banking, and the Supply of Money and Credit→General