The objective of this analysis is to find the best hierarchical model to forecast the total demand for regular gasoline in Bogotá, Colombia and, therefore, the collection of gasoline surcharges, which is an important tax used to finance road networks and massive transportation systems. We used...

This article analyzes the effect of the municipality on the academic result of the Colombian State test student "Saber 11". From linear hierarchical models with quantile regression, our results suggest that the type of municipality has a significant effect on students' academic achievement in...