OLCZYK, Magdalena and KUJAWSKA, Justyna. Effectiveness of European Green Deal implementation in EU countries: a DEA/Benefit-of-the-Doubt approach. Ekonomia i Prawo. Economics and Law. Online. 30 June 2026. Vol. 25, no. 2, pp. 175- 198. [Accessed 24 July 2026]. DOI 10.12775/EiP.2026.8.