Production costs, prices and income of firms. Economía y Sociedad, [S. l.], v. 20, n. 48, p. 1–17, 2015. DOI: 10.15359/eys.20-48.1. Disponível em: https://www.revistas.una.ac.cr/index.php/economia/article/view/7115.. Acesso em: 29 apr. 2024.