This claim is a fundamental economic principle regarding supply and demand dynamics, representing common knowledge that requires no empirical citation.
The claim states a standard microeconomic theorem (substitutes increase cross-price elasticity, shifting demand and lowering equilibrium price and quantity of the primary good). None of the retrieved papers specifically test or evaluate this general economic law; instead, they cover diverse applied topics such as nature-based solutions, biodiversity, disease-poverty traps, AI in supply chains, and environmental taxation. Therefore, the claim is classified as common knowledge.