Resumen: The contaminating effects of economic activity and the scarcity of natural resources has led firms to a situation in which corporate strategy has been compromised by environmental issues. The objective of this paper is to analyse some of the factors determining the pro-environmental change process by considering the drivers encouraging firms to progress in environmental protection and the barriers that curb this progress. Using a structural equation model implemented on a sample of 303 firms, our results confirm a direct and positive effect of stakeholder pressure and of the expectations of obtaining competitive advantages from the pro-environmental change process. The results also confirmed the indirect effect of stakeholder pressure on pro-environmental change through managers'' expectations of obtaining competitive advantages, which play a mediating role in the firm''s response. Although managers interpret the barriers we have studied as obstacles to adopting environmental protection measures, they do not prevent any firm from reaching advanced levels of pro-environmental change. Idioma: Inglés DOI: 10.3390/su9081327 Año: 2017 Publicado en: Sustainability (Switzerland) 9, 8 (2017), [15 pp] ISSN: 2071-1050 Factor impacto JCR: 2.075 (2017) Categ. JCR: GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY rank: 3 / 6 = 0.5 (2017) - Q2 - T2 Categ. JCR: ENVIRONMENTAL STUDIES rank: 51 / 108 = 0.472 (2017) - Q2 - T2 Categ. JCR: ENVIRONMENTAL SCIENCES rank: 120 / 241 = 0.498 (2017) - Q2 - T2 Categ. JCR: GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY rank: 21 / 33 = 0.636 (2017) - Q3 - T2 Factor impacto SCIMAGO: 0.537 - Geography, Planning and Development (Q2) - Management, Monitoring, Policy and Law (Q2) - Renewable Energy, Sustainability and the Environment (Q3)