Gutierrez Betancur, Juan Carlos, Astrid Katherine Gutiérrez Díaz, and Andrés Gómez Fernández. 2017. “Robust Estimation of Beta and the Hedging Ratio in Stock Index Futures In the Integrated Latin American Market”. Ecos De Economía 21 (44):37-71. https://doi.org/10.17230/ecos.2017.44.2.