Border Carbon Ajustment in Europe and Trade Retaliation: What would be the Cost for European Union?

Unilateral climate policy, such as carbon pricing, represents an additional cost to the economy, especially to energy-intensive industrial sectors, as well as those exposed to international competition. A border carbon adjustment (BCA) is often presented as an attractive policy option for countries that want to go ahead withou waiting for a global climate agreement. We used the computable general equilibrium model MIRAGE-e to simulate the impact of the introduction of a BCA on imports of energy intensive products in EU and EFTA countries and to evaluate the export losses their main trade partners would suffer. Given that a BCA is a trade measure, it would certainly lead to disputes at the World Trade Organization (WTO). If the BCA is considered illegal, the losses suffered by some partners may justify retaliation, as authorized by a WTO dispute settlement. The overall aggregated impacts of these measures would be negative but marginal, meaning that neither the BCA nor trade retaliation would have a marked impact on consumers' real income or GDP, while prohibitive retaliatory tariffs are more likely to target sensitive products in the EU. A BCA would ultimately be a signal of the EU's willingness to maintain an ambitious climate policy.