IDEAS home Printed from
MyIDEAS: Log in (now much improved!) to save this article

Análisis de interpretación de los parámetros de relación de varianzas en el modelo de frontera estocástica

Listed author(s):


    (Grupo de Eficiencia y Productividad de la Universidad de Córdoba. Departamento de Estadística e Investigación Operativa. Universidad de Córdoba. ETSIAM)

El presente trabajo recoge los resultados de un estudio sobre la interpretación de los parámetros de relación de varianzas en el modelo de frontera estocástica. Se valora el error cometido al no considerar la verdadera relación de varianzas de los dos componentes del error compuesto del modelo y que se produce al asignar a la variable truncada, la varianza de la normal de la que procede. Se definen los parámetros reales sobre los que hay que tomar conclusiones y se demuestra que los errores que se valoran, que pueden suponer una sobrevaloración de la presencia de la ineficiencia superior al 750%, dependen del coeficiente de variación y de la proporción en que intervenga la variable de ineficiencia. This work presents the results of a study carried out to point up the correct interpretation of the variances ratio in the stochastic frontier framework. We have evaluated the error which arises when the varance of the underlying normal variable is taken instead of that which corresponds to the truncated normal in the computation of the Gamma parameter. We have defined the real parameters on which decisions must be taken and have demonstrated that the above mentioned error prodeces an overevaluation of more than 750%, of the inefficiency presence. We also concluded that the evaluated error depens on the m /s ratio and on the inefficiency variable incidence in the composed error of the model.

If you experience problems downloading a file, check if you have the proper application to view it first. In case of further problems read the IDEAS help page. Note that these files are not on the IDEAS site. Please be patient as the files may be large.

File URL:
Download Restriction: Access to full text is restricted to subscribers.

As the access to this document is restricted, you may want to look for a different version under "Related research" (further below) or search for a different version of it.

Article provided by Estudios de Economía Aplicada in its journal Estudios de Economía Aplicada.

Volume (Year): 20 (2002)
Issue (Month): (Agosto)
Pages: 365-379

in new window

Handle: RePEc:lrk:eeaart:20_2_8
Contact details of provider: Postal:
Beatriz Rodríguez Prado. Facultad de CC.EE. y EE. Avda. Valle del Esgueva. Valladolid 47011 SPAIN

Phone: (34) 983 423320
Fax: (34) 983 184568
Web page:

More information through EDIRC

Order Information: Web: Email:

No references listed on IDEAS
You can help add them by filling out this form.

This item is not listed on Wikipedia, on a reading list or among the top items on IDEAS.

When requesting a correction, please mention this item's handle: RePEc:lrk:eeaart:20_2_8. See general information about how to correct material in RePEc.

For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Beatriz Rodríguez Prado)

If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

If references are entirely missing, you can add them using this form.

If the full references list an item that is present in RePEc, but the system did not link to it, you can help with this form.

If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your profile, as there may be some citations waiting for confirmation.

Please note that corrections may take a couple of weeks to filter through the various RePEc services.

This information is provided to you by IDEAS at the Research Division of the Federal Reserve Bank of St. Louis using RePEc data.