The document discusses the role of socio-economic analysis (SEA) in regulatory impact assessments mandated by the REACH regulation, which aims to manage chemicals safely while balancing human health, environmental protection, and market functioning. SEA is utilized to evaluate the benefits and costs of regulatory actions, including authorizations and restrictions of substances, by comparing different impacts and conducting uncertainty analyses. Key insights include the necessity of quantifying potential harms and benefits, utilizing monetary valuation for transparency, and the ongoing challenges in refining SEA methodology.