{"id":9202,"date":"2018-02-22T17:54:06","date_gmt":"2018-02-22T17:54:06","guid":{"rendered":"https:\/\/policonomics.com\/?p=9202\/"},"modified":"2018-02-23T11:40:50","modified_gmt":"2018-02-23T11:40:50","slug":"lp-economia-cerrada-is-ll","status":"publish","type":"post","link":"https:\/\/policonomics.com\/es\/lp-economia-cerrada-is-ll\/","title":{"rendered":"Econom\u00eda cerrada: Modelo IS-LL"},"content":{"rendered":"<p>En su art\u00edculo \u201cMr. Keynes and the Classical; a Suggested Interpretation\u201d, publicado en 1937 en la revista Econometrica, <a href=\"https:\/\/policonomics.com\/es\/john-hicks\/\"><em><u>John R.Hicks<\/u><\/em><\/a> desarroll\u00f3 un modelo conocido como IS-LL, que posteriormente pasar\u00eda a llamarse <a href=\"https:\/\/policonomics.com\/es\/is-lm\/\"><em><u>IS-LM<\/u><\/em><\/a>. El objetivo de este art\u00edculo era comparar el punto de vista de los <a href=\"https:\/\/policonomics.com\/es\/escuela-clasica-economia\/\"><em><u>economistas cl\u00e1sicos<\/u><\/em><\/a> sobre el mercado de bienes y valores, con las ideas de <a href=\"https:\/\/policonomics.com\/es\/keynes\/\"><em><u>Keynes<\/u><\/em><\/a>. En pocas palabras, Hicks asumir\u00eda que las innovaciones de Keynes (posibilidad de <a href=\"https:\/\/policonomics.com\/es\/desempleo\/\"><em><u>desempleo<\/u><\/em> <\/a>friccional, el impacto de los esp\u00edritus animales en la <a href=\"https:\/\/policonomics.com\/es\/inversion\/\"><em><u>inversi\u00f3n<\/u><\/em><\/a>, as\u00ed como el efecto de la ilusi\u00f3n monetaria) se dan en el corto plazo, mientas las perspectivas cl\u00e1sicas (como el pleno empleo, <a href=\"https:\/\/policonomics.com\/es\/competencia-perfecta\/\"><em><u>la competencia perfecta<\/u><\/em><\/a> y la habilidad de la econom\u00eda para auto equilibrarse sin <a href=\"https:\/\/policonomics.com\/es\/intervencion-gubernamental\/\"><em><u>intervenci\u00f3n estatal<\/u><\/em><\/a>) son v\u00e1lidas en el largo plazo.<\/p>\n<p>Hicks empieza con las siguientes hip\u00f3tesis de partida:<\/p>\n<p style=\"padding-left: 30px;\">-considera el corto plazo;<\/p>\n<p style=\"padding-left: 30px;\">-la cantidad de maquinaria f\u00edsica es fija;<\/p>\n<p style=\"padding-left: 30px;\">-el trabajo es homog\u00e9neo;<\/p>\n<p style=\"padding-left: 30px;\">-la depreciaci\u00f3n no se considera;<\/p>\n<p style=\"padding-left: 30px;\">-los salarios nominales (w) son dados;<\/p>\n<p style=\"padding-left: 30px;\">-la cantidad de dinero (M) es dada;<\/p>\n<p style=\"padding-left: 30px;\">-el nivel de precios de los bienes es igual al coste marginal.<\/p>\n<p>(Para simplificar, no consideramos diferencias entre inversi\u00f3n y consumo de bienes, ni diferencias entre distribuciones de la renta.)<\/p>\n<p>Hicks tambi\u00e9n define las siguientes variables que reformularemos de una manera sencilla:<\/p>\n<p style=\"padding-left: 30px;\">-Y: renta total;<\/p>\n<p style=\"padding-left: 30px;\">-M: oferta monetaria (que es dada);<\/p>\n<p style=\"padding-left: 30px;\">-I: inversi\u00f3n;<\/p>\n<p style=\"padding-left: 30px;\">-S: ahorros;<\/p>\n<p style=\"padding-left: 30px;\">-i: tipo de inter\u00e9s;<\/p>\n<p>Combinando las perspectivas cl\u00e1sica y Keynesiana, Hicks escribe las siguientes tres ecuaciones:<\/p>\n<p style=\"padding-left: 30px;\">-M(Y,i): la oferta monetaria depende de la renta total y del tipo de inter\u00e9s;<\/p>\n<p style=\"padding-left: 30px;\">-I(i): la inversi\u00f3n depende del tipo de inter\u00e9s;<\/p>\n<p style=\"padding-left: 30px;\">-I=S(Y): la inversi\u00f3n ha de ser igual al ahorro que depende de la renta total.<\/p>\n<p>De estas tres ecuaciones, podemos ver la relaci\u00f3n entre la renta total y el tipo de inter\u00e9s en ambos mercados:<\/p>\n<p style=\"padding-left: 30px;\"><a href=\"https:\/\/policonomics.com\/wp-content\/uploads\/2016\/02\/IS-LL-IS-LM-de-Hicks.jpg\" rel=\"lightbox\"><img fetchpriority=\"high\" decoding=\"async\" class=\"alignright wp-image-3714 size-medium\" src=\"https:\/\/policonomics.com\/wp-content\/uploads\/2016\/02\/IS-LL-IS-LM-de-Hicks-300x238.jpg\" alt=\"Modelo IS-LL de Hicks\" width=\"300\" height=\"238\" srcset=\"https:\/\/policonomics.com\/wp-content\/uploads\/2016\/02\/IS-LL-IS-LM-de-Hicks-300x238.jpg 300w, https:\/\/policonomics.com\/wp-content\/uploads\/2016\/02\/IS-LL-IS-LM-de-Hicks-768x609.jpg 768w, https:\/\/policonomics.com\/wp-content\/uploads\/2016\/02\/IS-LL-IS-LM-de-Hicks-1024x812.jpg 1024w, https:\/\/policonomics.com\/wp-content\/uploads\/2016\/02\/IS-LL-IS-LM-de-Hicks-600x476.jpg 600w, https:\/\/policonomics.com\/wp-content\/uploads\/2016\/02\/IS-LL-IS-LM-de-Hicks-1140x904.jpg 1140w, https:\/\/policonomics.com\/wp-content\/uploads\/2016\/02\/IS-LL-IS-LM-de-Hicks-560x444.jpg 560w, https:\/\/policonomics.com\/wp-content\/uploads\/2016\/02\/IS-LL-IS-LM-de-Hicks.jpg 1233w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a>-Mercado de dinero: ya que la oferta monetaria es dada, la curva LL (azul) tiene pendiente positiva, porque un aumento de la renta normalmente produce un aumento de la demanda de dinero (la gente necesita efectivo para adquirir bienes) y un aumento del tipo de inter\u00e9s tiende a disminuir la demanda de dinero. La explicaci\u00f3n de esto \u00faltimo se puede ver de dos formas: la gente ahorrar\u00e1 m\u00e1s dinero porque los intereses son mayores, por lo que gastar\u00e1n menos y demandar\u00e1n menos efectivo; o la gente est\u00e1 menos dispuesta a tomar dinero prestado de los bancos, para gastar o invertir, debido a los altos tipos.<\/p>\n<p style=\"padding-left: 30px;\">-Mercado de bienes: la curva IS (verde) muestra la relaci\u00f3n entre la renta y el inter\u00e9s necesario para igualar inversi\u00f3n y ahorro. La pendiente es negativa ya que cuanto menor sea el inter\u00e9s, m\u00e1s gente invertir\u00e1 y por tanto mayor ser\u00e1 la renta total.<\/p>\n<p>La renta y el tipo de inter\u00e9s est\u00e1n determinados en el punto de intersecci\u00f3n de las dos curvas (punto P).<\/p>\n<p>Este modelo (m\u00e1s precisamente, el modelo IS-LM) es usado hoy en d\u00eda para mostrar el efecto de diversas <a href=\"https:\/\/policonomics.com\/es\/politica-economica\/\"><em><u>pol\u00edticas econ\u00f3micas<\/u><\/em><\/a> en una econom\u00eda cerrada y sirve de punto de inicio para <a href=\"https:\/\/policonomics.com\/es\/is-lm-bp\/\"><em><u>el modelo de Mundell-Fleming<\/u><\/em><\/a>, que ayuda a entender sus efectos en una econom\u00eda abierta.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Las econom\u00edas cerradas se definen como pa\u00edses que son autosuficientes y aut\u00e1rquicos. Una analog\u00eda ampliamente utilizada por los profesores de Econom\u00eda es la isla de Robinson Crusoe, ya que Crusoe no pudo comerciar. Esta econom\u00eda unipersonal es la forma m\u00e1s f\u00e1cil de entender las econom\u00edas cerradas.<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[362],"tags":[],"class_list":["post-9202","post","type-post","status-publish","format-standard","hentry","category-lpes-seccion"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Las econom\u00edas cerradas se definen como pa\u00edses que son autosuficientes y aut\u00e1rquicos. Una analog\u00eda ampliamente utilizada por los profesores de Econom\u00eda es la isla de Robinson Crusoe, ya que Crusoe no pudo comerciar. 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Una analog\u00eda ampliamente utilizada por los profesores de Econom\u00eda es la isla de Robinson Crusoe, ya que Crusoe no pudo comerciar. Esta econom\u00eda unipersonal es la forma m\u00e1s f\u00e1cil de entender las econom\u00edas cerradas.","og:url":"https:\/\/policonomics.com\/es\/lp-economia-cerrada-is-ll\/","og:image":"https:\/\/policonomics.com\/wp-content\/uploads\/2025\/09\/logo-policonomics-b.png","og:image:secure_url":"https:\/\/policonomics.com\/wp-content\/uploads\/2025\/09\/logo-policonomics-b.png","article:published_time":"2018-02-22T17:54:06+00:00","article:modified_time":"2018-02-23T11:40:50+00:00","twitter:card":"summary_large_image","twitter:title":"Econom\u00eda cerrada: Modelo IS-LL - Policonomics","twitter:description":"Las econom\u00edas cerradas se definen como pa\u00edses que son autosuficientes y aut\u00e1rquicos. Una analog\u00eda ampliamente utilizada por los profesores de Econom\u00eda es la isla de Robinson Crusoe, ya que Crusoe no pudo comerciar. 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