Test learners' ability to design a progressive carbon border adjustment mechanism for a trading bloc and to construct, calibrate, and run a multi‑sector economic model (e.g., CGE or multi‑sector partial equilibrium with input‑output linkages) to evaluate impacts on domestic industries, international trade flows, carbon leakage, consumer prices, and household distributional outcomes. The quiz assesses policy-design choices (coverage, progressive rates, benchmarks, rebates), model specification (sectoral disaggregation, trade elasticities, compliance rules), data calibration, scenario and sensitivity analysis across alternative compliance and carbon‑price pathways, and interpretation of quantitative results for policy recommendations.