Ramírez, José Carlos, and Rogelio Sandoval Saavedra. “A Proposal to Evaluate Stock Performance Forecasts When Empirical Distributions Are Not Normally Stationary”. Estudios Económicos de El Colegio de México 18, no. 2 (July 1, 2003): 237–277. Accessed July 17, 2024. https://estudioseconomicos.colmex.mx/index.php/economicos/article/view/182.