WATTS, Brad R. Understanding Opportunity Costs and the Economist’s View: A Response to Scriven’s "The Economist’s Fallacy". Journal of MultiDisciplinary Evaluation, Kalamazoo, MI, USA, v. 5, n. 10, p. 89–92, 2008. DOI: 10.56645/jmde.v5i10.194. Disponível em: https://jmde.journals.publicknowledgeproject.org/index.php/jmde_1/article/view/194. Acesso em: 3 may. 2026.