In this paper we are interested in investigating the effects of the threepart tariffs system on consumers´ behavior in the local fixed telephone service provided by the incumbent Telecommunications Company une in Medellín, which was authorized by the TelecommunicationsRegulatory Commission...

In this article, the Engel curves for different types of health expenses are estimated. To this end, semiparametric models using information from the Survey of Life Quality in 1997 are employed. In addition, endogeneity problems were corrected using two-stage built regressors. Bootstrap...

This paper investigates the factors that determine electric power prices in the Colombian market. In addition, we carry out a long-run forecasting analysis to pool-traded electric power prices by using Vector Error Correction estimation and neuronal networks. Given the optimistic atmosphere that...