Abstract
This chapter explores the economic impacts of EU just energy transition policies in three phasing-out regions in Greece, Bulgaria and Poland. It specifically focuses on regional specialization, sectoral development and regional competitiveness. Through a comparative regional analysis approach, social and economic indicators that shape the conditions for regional resilience are examined. Emphasis is placed on the transformation of the coal industry, renewable energy and green technology. By integrating economic data analysis and the critical assessment of energy policies, the article explores employment trends and productivity dynamics. The analysis also examines the critical factors shaping regional competitiveness. The trajectory of sectoral development over time shows a differentiation between the regions examined in terms of the speed and effectiveness of adaptation and regional resilience. The findings of the article provide policymakers and researchers with beneficial information for promoting sustainable, equitable and resilient energy transitions at the regional level.

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