{"id":1043,"date":"2020-11-12T22:01:50","date_gmt":"2020-11-12T22:01:50","guid":{"rendered":"https:\/\/ricovictor.com\/?p=1043"},"modified":"2020-11-12T22:14:08","modified_gmt":"2020-11-12T22:14:08","slug":"pronosticos-para-series-de-tiempo-con-la-metodologia-box-jenkins-i","status":"publish","type":"post","link":"https:\/\/ricovictor.com\/index.php\/2020\/11\/12\/pronosticos-para-series-de-tiempo-con-la-metodologia-box-jenkins-i\/","title":{"rendered":"Pron\u00f3sticos para series de tiempo con la metodolog\u00eda Box-Jenkins (I)"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"1043\" class=\"elementor elementor-1043\">\n\t\t\t\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-380b829e elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"380b829e\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-wide\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-738ae54c\" data-id=\"738ae54c\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-7766e413 elementor-widget elementor-widget-text-editor\" data-id=\"7766e413\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>\u00a0<\/p><p>\u00a1Qu\u00e9 tal!, Es un placer poder presentarme contigo e introducirte a uno de los temas fundamentales en el <strong>pron\u00f3stico de precios<\/strong> de instrumentos financieros.<\/p><p>El prop\u00f3sito de esta serie de blogs es llevar a cabo una explicaci\u00f3n te\u00f3rica que sea para \u00e9l lector lo m\u00e1s digerible posible, e implementar una<strong> aplicaci\u00f3n pr\u00e1ctica para el pron\u00f3stico del precio<\/strong> de un instrumento financiero con el fin de tomar <strong>decisiones de inversi\u00f3n<\/strong> de dicho activo. Es por esto, que el articulo estar\u00e1 dividido en por lo menos en 5 partes de acuerdo con la <strong>metodolog\u00eda Box-Jenkins (BJ)<\/strong>.<\/p><p>En esta primera parte daremos una explicaci\u00f3n te\u00f3rica sobre el uso de los modelos econom\u00e9tricos frente a otro tipo de modelos de la teor\u00eda financiera, as\u00ed como explicar los pasos a seguir en la metodolog\u00eda.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2c0d31f elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"2c0d31f\" data-element_type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-7f1145c9\" data-id=\"7f1145c9\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-43375528 elementor-widget elementor-widget-image\" data-id=\"43375528\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"640\" src=\"https:\/\/ricovictor.com\/wp-content\/uploads\/2020\/11\/mac-1784459_640.png\" class=\"attachment-large size-large wp-image-1047\" alt=\"\" srcset=\"https:\/\/ricovictor.com\/wp-content\/uploads\/2020\/11\/mac-1784459_640.png 640w, https:\/\/ricovictor.com\/wp-content\/uploads\/2020\/11\/mac-1784459_640-150x150.png 150w, https:\/\/ricovictor.com\/wp-content\/uploads\/2020\/11\/mac-1784459_640-100x100.png 100w, https:\/\/ricovictor.com\/wp-content\/uploads\/2020\/11\/mac-1784459_640-300x300.png 300w, https:\/\/ricovictor.com\/wp-content\/uploads\/2020\/11\/mac-1784459_640-250x250.png 250w, https:\/\/ricovictor.com\/wp-content\/uploads\/2020\/11\/mac-1784459_640-174x174.png 174w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-3f1102b0 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"3f1102b0\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-7718f4a7\" data-id=\"7718f4a7\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-6c0213a elementor-widget elementor-widget-spacer\" data-id=\"6c0213a\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-670aee9a elementor-widget elementor-widget-text-editor\" data-id=\"670aee9a\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Para comenzar, hay que definir la naturaleza del an\u00e1lisis de los <strong>modelos ARIMA<\/strong>, los cuales son empleados para esta metodolog\u00eda, y es que a diferencia de otros <strong>modelos econom\u00e9tricos<\/strong> convencionales, no se busca estudiar una relaci\u00f3n funcional entre dos o m\u00e1s variables, (Aunque la metodolog\u00eda puede aplicarse al estudio multivariable), sino que basamos la explicaci\u00f3n del comportamiento y el pronostico de nuestro modelo en el <strong>comportamiento pasado<\/strong> de la serie de tiempo.<\/p><p>Con esto busca ser un modelo que explique a trav\u00e9s de los datos hist\u00f3ricos el <strong>comportamiento futuro<\/strong> de la variable a trav\u00e9s los t\u00e9rminos del error aleatorio, por lo que se estudian las propiedades probabil\u00edsticas o aleatorias de las series de tiempo.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-437b332a elementor-view-default elementor-widget elementor-widget-icon\" data-id=\"437b332a\" data-element_type=\"widget\" data-widget_type=\"icon.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-icon-wrapper\">\n\t\t\t<div class=\"elementor-icon\">\n\t\t\t<i aria-hidden=\"true\" class=\"far fa-hand-point-down\"><\/i>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-e3fbd66 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"e3fbd66\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-3f163f0\" data-id=\"3f163f0\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-b831f8c elementor-widget elementor-widget-text-editor\" data-id=\"b831f8c\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Otro aspecto importante que no se debe de pasar por alto, en t\u00e9rminos de <strong>Teor\u00eda financiera<\/strong>, es que esta serie de <a href=\"https:\/\/ricovictor.com\/index.php\/category\/econometria\/\">modelos econom\u00e9tricos<\/a>, no necesariamente tienen una relaci\u00f3n normativa con modelos de teor\u00eda financiera, ya que se basan en <strong>explicar, describir y pronosticar<\/strong> el comportamiento de las series de tiempo, entendi\u00e9ndolo como un <strong>proceso aleatorio<\/strong>.<\/p><p>Esto quiere decir, que los modelos explicativos que tratan de entender el <strong>comportamiento del movimiento del precio<\/strong> de los instrumentos financieros no tienen una relevancia para el desarrollo de estos modelos, ya que basan el estudio de los instrumentos financieros en <strong>procesos aleatorios<\/strong>\u00a0 donde los datos de la serie de tiempo se explican as\u00ed <strong>mismo con su comportamiento hist\u00f3rico<\/strong>.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a49c4ef elementor-widget elementor-widget-image\" data-id=\"a49c4ef\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"725\" height=\"355\" src=\"https:\/\/ricovictor.com\/wp-content\/uploads\/2020\/04\/var-precio.png\" class=\"attachment-large size-large wp-image-133\" alt=\"\" srcset=\"https:\/\/ricovictor.com\/wp-content\/uploads\/2020\/04\/var-precio.png 725w, https:\/\/ricovictor.com\/wp-content\/uploads\/2020\/04\/var-precio-300x147.png 300w\" sizes=\"(max-width: 725px) 100vw, 725px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-67bc2c21 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"67bc2c21\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-6dfd8982\" data-id=\"6dfd8982\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-4bb3cff elementor-widget elementor-widget-spacer\" data-id=\"4bb3cff\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-56f0765f elementor-widget elementor-widget-text-editor\" data-id=\"56f0765f\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<h2>Metodolog\u00eda Box Jenkins. Pasos a seguir\u00a0<\/h2><p>\u00a0<\/p><p><strong>La metodolog\u00eda BJ<\/strong> hace uso de los modelos autorregresivos integrado de promedios m\u00f3viles por sus siglas, <a href=\"https:\/\/ricovictor.com\/index.php\/codigos-r\/\">modelos ARIMA<\/a>.<\/p><p>Las dos especificaciones principales de esta metodolog\u00eda son los modelos autorregresivos <strong>AR(p)<\/strong> y los modelos de promedio m\u00f3vil <strong>MA(q)<\/strong>.<\/p><p>Por el momento no profundizaremos en la explicaci\u00f3n de estos conceptos, nos centraremos en entender la metodolog\u00eda y quedarnos con la idea de explicar una variable con base a su propio pasado para entender y predecir su comportamiento futuro, es decir, autorregresivo.<\/p><p><strong>Los pasos de BJ est\u00e1n divididos en 4<\/strong>, que podemos ver en el siguiente gr\u00e1fico y explicados abajo.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2ff461be elementor-view-default elementor-widget elementor-widget-icon\" data-id=\"2ff461be\" data-element_type=\"widget\" data-widget_type=\"icon.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-icon-wrapper\">\n\t\t\t<div class=\"elementor-icon\">\n\t\t\t<i aria-hidden=\"true\" class=\"far fa-hand-point-down\"><\/i>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-523e7ec7 elementor-widget elementor-widget-image\" data-id=\"523e7ec7\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"439\" height=\"218\" src=\"https:\/\/ricovictor.com\/wp-content\/uploads\/2020\/11\/Estebam_1.png\" class=\"attachment-large size-large wp-image-1045\" alt=\"\" srcset=\"https:\/\/ricovictor.com\/wp-content\/uploads\/2020\/11\/Estebam_1.png 439w, https:\/\/ricovictor.com\/wp-content\/uploads\/2020\/11\/Estebam_1-300x149.png 300w, https:\/\/ricovictor.com\/wp-content\/uploads\/2020\/11\/Estebam_1-400x200.png 400w\" sizes=\"(max-width: 439px) 100vw, 439px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-db98126 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"db98126\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-c4c618f\" data-id=\"c4c618f\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-9be8f28 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"9be8f28\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-5111a200\" data-id=\"5111a200\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-4bd8b4b5 elementor-widget elementor-widget-text-editor\" data-id=\"4bd8b4b5\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<ol><li><strong>Identificaci\u00f3n<\/strong>: En esta etapa determinamos el <strong>modelo y el orden<\/strong> de estos que mejor se ajustan a estos datos, es decir, encontramos valores apropiados de <strong>p, d y q<\/strong>. En esta etapa utilizamos m\u00e9todos gr\u00e1ficos, el correlograma y el correlograma parcial.<\/li><\/ol><p>\u00a0<\/p><ol start=\"2\"><li><strong>Estimaci\u00f3n:<\/strong> Estimar el modelo seleccionado, es decir estimar los <strong>par\u00e1metros de los t\u00e9rminos autorregresivos<\/strong> y de promedios m\u00f3viles incluidos en el modelo. Este c\u00e1lculo puede efectuarse mediante m\u00ednimos cuadrados simples, pero puede recurrirse a m\u00e9todos de estimaci\u00f3n no lineal en los par\u00e1metros.<\/li><\/ol><p>\u00a0<\/p><ol start=\"3\"><li><strong>Examen diagn\u00f3stico:<\/strong> Despu\u00e9s de seleccionar un <strong>modelo ARIMA<\/strong> en particular y de estimar sus par\u00e1metros, veremos si el modelo seleccionado se ajusta adecuadamente a nuestros datos ya que en caso de que no, puede que exista otro modelo ARIMA que se ajuste mejor a los datos, para esto existen dos m\u00e9todos: **El primero consiste en crear un modelo con m\u00e1s <strong>rezagos<\/strong> para identificar que no sean estad\u00edsticamente significativos. **El segundo consiste en <strong>analizar los residuos del modelo<\/strong> seleccionado. Esta etapa es fundamental para continuar con el pron\u00f3stico, ya que en caso contrario es necesario volver al paso uno y replantear la metodolog\u00eda, esto lo comprobaremos mediante la prueba <strong>Ljung-Box<\/strong>.<\/li><\/ol><p>\u00a0<\/p><ol start=\"4\"><li><strong>Pronostico: <\/strong>La popularidad de estos modelos, esta en la capacidad de \u00e9xito en el pron\u00f3stico, que en muchas ocasiones resulta mejor que modelos tradicionales de econometr\u00eda y otros modelos normativos de teor\u00eda financiera. En esta etapa final <strong>realizaremos inferencias y pron\u00f3sticos<\/strong> con el modelo estimado para la toma de decisiones de inversi\u00f3n a corto plazo.<\/li><\/ol><p>\u00a0<\/p><p>Con esto concluiremos la entrada de este art\u00edculo, en los siguientes, comenzaremos a aplicar la metodolog\u00eda de lleno, explicando m\u00e1s a detalle los conceptos matem\u00e1ticos y realizando una aplicaci\u00f3n practica para un instrumento financiero.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>\u00a1Qu\u00e9 tal!, Es un placer poder presentarme contigo e introducirte a uno de los temas fundamentales en el pron\u00f3stico de precios de instrumentos financieros. El prop\u00f3sito de esta serie de blogs es llevar a cabo una explicaci\u00f3n te\u00f3rica que sea para \u00e9l lector lo m\u00e1s digerible posible, e implementar una aplicaci\u00f3n pr\u00e1ctica para el pron\u00f3stico &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/ricovictor.com\/index.php\/2020\/11\/12\/pronosticos-para-series-de-tiempo-con-la-metodologia-box-jenkins-i\/\"> <span class=\"screen-reader-text\">Pron\u00f3sticos para series de tiempo con la metodolog\u00eda Box-Jenkins (I)<\/span> Leer m\u00e1s &raquo;<\/a><\/p>\n","protected":false},"author":5,"featured_media":1049,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"footnotes":""},"categories":[2],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Pron\u00f3sticos para series de tiempo con la metodolog\u00eda Box-Jenkins (I) - V\u00edctor A. 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