Demand Information Sharing in Building Material Supply Chain Considering Competing Manufacturers’ Greening Efforts

The environmental pollution problem caused by the construction industry has been paid attention to by scholars. However, few existing studies on supply chain management explore the interplay between information-sharing strategies and green-effort strategies in a green building materials supply chain. This study explores green building materials design and information-sharing dynamics in a supply chain consisting of a common building enterprise and two competing building materials manufacturers. The building enterprise decides whether to share demand information with manufacturers, who then determine product greenness, while the building enterprise determines the retail price. The findings reveal that information sharing has dual effects on manufacturers’ profitability, depending on competitive dynamics and demand sensitivity to building materials greenness. Additionally, the interplay between information sharing and green design strategies highlights the importance of aligning product design decisions with optimal information-sharing practices. While information sharing consistently improves environmental performance in a bilateral monopoly system where a single manufacturer provides building materials to a single building enterprise, it can induce adverse environmental outcomes in competitive scenarios. These results provide actionable guidance for developing green supply chain strategies that balance economic and environmental goals.