The spurious regression phenomenon, identified by Granger and Newbold (1974) is well known in econometrics. In fact, spurious regression occurs under a wide variety of Data Generating Processes: driftless unit root, unit root with drift, trend stationarity, broken-trend stationarity,… However,...

We present a new heteroskedastic conditional variance model using NonLinear Moving Average as the basis for this specification [NLMACH(q)]. The typical problem of this class of models-i.e., noninvertibility—is solved by means of an intuitive parametric restriction; this allows us to use...

Durante la última década la participación laboral, desempleo, subempleo e informalidad, correspondientes a la ciudad de Ibagué han estado por encima del promedio de las trece principales ciudades de Colombia. Esto indica problemas importantes en el mercado laboral de la ciudad que pueden...

This paper shows that the evolution of the level of Mexico real and real per capita output between 1895 and 2008 can be adequately described through a trendstationary model, affected by 4 structural breaks, which occurred at dates that seem to coincide with domestic institutional arrangements,...

The Customer Lifetime Value (CLV ) concept has been highly used in the marketing area over the years. In this paper the authors present some useful extensions for the case of uncertain data. In particular, a CLV estimation with triangular fuzzy numbers (TFN) is introduced.

Este artículo analiza la calidad del empleo en las principales ciudades colombianas en 2009. Los resultados muestran que aun cuando el índice ha mejorado con respecto a 2001, sigue siendo inferior al nivel necesario para tener un empleo de calidad. Además, comprueba la endogeneidad de la...

In this paper we analyze intergenerational educational mobility for afro-descendants and no afro-descendants in Uruguay. We consider the relationship between educational achievements of teenagers and their parents’. The results show that relative mobility is higher among afro-descendants than...

In recent years the program evaluation methods have become very popular in applied microeconomics. However, the variety of these methods responds to specific problems, which are normally determined by the data available and the impact the researcher tries to measure. This paper summarizes the...

Financial markets currently offer various investment alternatives, including a variety of assets, which are differentiated by the level of profitability, liquidity, volatility and trading volume associated with them, among other characteristics of the market; it which implies that investors use...

Migration movements in the south border of México with Guatemala, has motivated serious social, economic and politic un-stability in both countries. During the last decades of the XX-th century, the sites of the south zone have become in zones with high violence indexes, delinquency and...