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This paper develops a flexible method to assess the heterogeneous impact of asymmetric climate policies on sectoral competitiveness. It builds on input-output analysis and national accounts data to provide proxies for both the carbon intensity of production and the exposure to international competition at the sectoral level. These are used to quantitatively appraise the impact of carbon taxation on price competitiveness at a high level of sectoral disaggregation. The method is applied to the case of Belgium.JEL: C67, D57, H23, Q58