<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0120-1751</journal-id>
<journal-title><![CDATA[Revista Colombiana de Estadística]]></journal-title>
<abbrev-journal-title><![CDATA[Rev.Colomb.Estad.]]></abbrev-journal-title>
<issn>0120-1751</issn>
<publisher>
<publisher-name><![CDATA[Departamento de Estadística - Universidad Nacional de Colombia.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-17512006000100005</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Predicción de series temporales con redes neuronales: una aplicación a la inflación colombiana]]></article-title>
<article-title xml:lang="en"><![CDATA[Forecasting Time Series with Neural Networks: An Application to the Colombian Inflation]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[SANTANA]]></surname>
<given-names><![CDATA[JUAN CAMILO]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad Federal de Pernambuco  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Brasil</country>
</aff>
<pub-date pub-type="pub">
<day>03</day>
<month>06</month>
<year>2006</year>
</pub-date>
<pub-date pub-type="epub">
<day>03</day>
<month>06</month>
<year>2006</year>
</pub-date>
<volume>29</volume>
<numero>1</numero>
<fpage>77</fpage>
<lpage>92</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-17512006000100005&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-17512006000100005&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-17512006000100005&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Evaluar la capacidad de las redes neuronales en la predicción de series temporales es de sumo interés. Una aplicación que pronostique valores futu ros de la serie de inflación colombiana permite mostrar que las redes neuro nales pueden ser más precisas que las metodologías SARIMA de Box-Jenkins y el suavizamiento exponencial. Además, los resultados revelan que la combi nación de pronósticos que hacen uso de las redes neuronales tiende a mejorar la capacidad de predicción.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Evaluating the usefulness of neural network methods in predicting the Colombian Inflation is the main goal of this paper. The results show that neural networks forecasts can be considerably more accurate than forecasts obtained using exponential smoothing and SARIMA methods. Experimental results also show that combinations of individual neural networks forecasts improves the forecasting accuracy.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Perceptron multicapas]]></kwd>
<kwd lng="es"><![CDATA[modelos SARIMA]]></kwd>
<kwd lng="es"><![CDATA[suavizamiento exponencial]]></kwd>
<kwd lng="es"><![CDATA[combinación de pronósticos]]></kwd>
<kwd lng="es"><![CDATA[componentes no observables]]></kwd>
<kwd lng="en"><![CDATA[Multilayer perceptron]]></kwd>
<kwd lng="en"><![CDATA[SARIMA models]]></kwd>
<kwd lng="en"><![CDATA[Exponencial smooth- ing]]></kwd>
<kwd lng="en"><![CDATA[Combination of forecasts]]></kwd>
<kwd lng="en"><![CDATA[Unobservable components]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[  <font size="2" face="verdana">      <p>    <center><b><font size="4">Predicci&oacute;n de series temporales con redes neuronales: una aplicaci&oacute;n a la inflaci&oacute;n colombiana</font></b></center></p>      <p>    <center><b><font size="3">Forecasting Time Series with Neural Networks: An Application to the Colombian Inflation</font></b></center></p>      <p>    <center>JUAN CAMILO SANTANA<sup>1</sup></center></p>      <p><sup>1</sup>Universidad Federal de Pernambuco, Brasil, Maestro en Estad&iacute;stica. E-mail: csantana@cable.net.co</p>  <hr size="1">      <p>    <center><b>Resumen</b></center></p>      ]]></body>
<body><![CDATA[<p>Evaluar la capacidad de las redes neuronales en la predicci&oacute;n de series temporales es de sumo inter&eacute;s. Una aplicaci&oacute;n que pronostique valores futu ros de la serie de inflaci&oacute;n colombiana permite mostrar que las redes neuro nales pueden ser m&aacute;s precisas que las metodolog&iacute;as SARIMA de Box-Jenkins y el suavizamiento exponencial. Adem&aacute;s, los resultados revelan que la combi naci&oacute;n de pron&oacute;sticos que hacen uso de las redes neuronales tiende a mejorar la capacidad de predicci&oacute;n.</p>      <p><b><i>Palabras Claves:</i></b> Perceptron multicapas, modelos SARIMA, suavizamiento exponencial, combinaci&oacute;n de pron&oacute;sticos, componentes no observables.</p>  <hr size="1">      <p>    <center><b>Abstract</b></center></p>      <p>Evaluating the usefulness of neural network methods in predicting the Colombian Inflation is the main goal of this paper. The results show that neural networks forecasts can be considerably more accurate than forecasts obtained using exponential smoothing and SARIMA methods. Experimental results also show that combinations of individual neural networks forecasts improves the forecasting accuracy.</p>      <p><i><b>Key words:</b></i> Multilayer perceptron, SARIMA models, Exponencial smooth- ing, Combination of forecasts, Unobservable components.</p>  <hr size="1">      <p>Texto completo disponible en <a href="pdf/rce/v29n1/v29n1a05.pdf">PDF</a></p>  <hr size="1">      <p><b><font size="3">Referencias</font></b></p>      <!-- ref --><p>1. Aristiz&aacute;bal, M. &amp; Misas, M. (2006), Evaluaci&oacute;n asim&eacute;trica de una red neuronal artificial: una aplicaci&oacute;n al caso de la inflaci&oacute;n en Colombia, Technical report, Working Paper 377. 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