The Gaussian GARCH (1,1) model has traditionally been used for studying the exchange rate. However, an important number of recent studies, using FIGARCH and HYGARCH models, have found evidence for the persistence of exchange rate volatility. This study, using nested models, found evidence in...

Resumen: En este artículo se presenta la evolución d el mercado laboral colombiano, tanto en el largo como en el corto plazo, así como una evaluación de los impactos de la reforma laboral de 2002 sobre la generación y calidad del empleo. Las estimaciones muestran que el empleo en las siete...

In regression analysis, it is frequently required to transform the dependent variable in order to obtain additivity and normal errors with constant variance. Box and Cox (1964) proposed a parametric power transformation based on the assumption of normality with the aim to achieve these goals....

In this work, we present a modification of the hypothesis testing procedure for the existence of long memory in the stationary and invertible ARFIMA(p,d,q) process proposed by Castaño, Gómez and Gallón (2008). This modification allows assessing the existence of a fractional root in a...

Frecuentemente los beneficiarios de los programas sociales del Estado son identificados por medio de indicadores aproximados de los recursos (proxy means test), los cuales tratan de medir el bienestar de los inviduos del hogar. Uno de los más empleados es el predictor de una regresión del...

Many of the time series used in practice are monthly observations and due to the fact that the number of times any weekday occurs, depends on the month in question, the series can be influenced by changes in the number of working days. Some of these series can also be influenced by other...

This paper tries to test an economic explanation of the industrial demand for electricity in Colombia during the period 1970-1983. The estimation of the translog equations shows the complementary or substitutability between energy and other inputs in the industrial production function. After...

This article shows a general overview of the technological structure found in the industrial sector in Antioquia during the period 1975-1987. The analysis assumes a two-level production function. In the first level the inputs used are capital, employment, energy and other raw material. The...

The objective of this article is to explain the decreasing trend of monthly consumption per user in Medellín during the period 1985•1991. To reach the goal it was necessary to search in economic theory for those methodological tools allowing an appropiate analysis of the problem posed....