On the Existence of a Unit Root in the Time Series of Monthly Electricity Prices in Colombia
Usually, the time series of electricity prices in different markets show structural changes due to economic conditions related to supply, demand or specific market rules. While some of the proposals for modeling these series are based on mean reversion models inspired by the financial literature (Philipovic, 1998), its jumps and structural changes have evidenced the existence of regimes with different means and variances (Huisman, 2003). In Colombia, these series seem to show an overall growing pattern. This article seeks to find evidence of whether this growing pattern is due to the presence of a purely deterministic trend; or if there is a unit root, implying the existence of a stochastic trend; or if the series is generated by a stationary process around various changes of level, which could have been caused by various exogenous events such as the weather phenomena of El Niño and La Niña and the resolutions of the Comisión de Regulación de Energía y Gas in the country. The results are in favor of stationary process around multiple level changes, and highlight the importance of having information. about the events that occurred in the evolution of the process.
Volume (Year): (2012)
Issue (Month): 76 ()
|Contact details of provider:|| Web page: http://economia.udea.edu.co|
More information through EDIRC
|Order Information:|| Postal: Lecturas de Economía, Departamento de Economía, Calle 67, 53-108, Medellin 050010, Colombia.|
When requesting a correction, please mention this item's handle: RePEc:lde:journl:y:2012:i:76:p:259-291. 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: (Carlos Andrés Vasco Correa)
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.