<?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>2448-718X</journal-id>
<journal-title><![CDATA[El trimestre económico]]></journal-title>
<abbrev-journal-title><![CDATA[El trimestre econ]]></abbrev-journal-title>
<issn>2448-718X</issn>
<publisher>
<publisher-name><![CDATA[Fondo de Cultura Económica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2448-718X2025000100159</article-id>
<article-id pub-id-type="doi">10.20430/ete.v92i365.2291</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Examinando los patrones de especialización vertical y concentración industrial con un modelo de insumo-producto no lineal]]></article-title>
<article-title xml:lang="en"><![CDATA[Examining patterns of vertical specialization and industrial concentration with a nonlinear input-output model]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Betancourt-Gómez]]></surname>
<given-names><![CDATA[Michel Eduardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,UNAM  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2025</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2025</year>
</pub-date>
<volume>92</volume>
<numero>365</numero>
<fpage>159</fpage>
<lpage>181</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2448-718X2025000100159&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2448-718X2025000100159&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2448-718X2025000100159&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Examinamos los indicadores de especialización vertical cuando cambia el nivel de concentración industrial para una colección de países contenidos en las tablas de insumo-producto de la Organización para la Cooperación y el Desarrollo Económicos (OCDE). Para esto, proponemos una estrategia metodológica que logra integrar la concentración industrial dentro de una versión no lineal del modelo de insumo-producto. Como se sabe, dicho modelo asume libre competencia, pues, al tomar una estructura lineal, éste no permite considerar estructuras de mercado concentradas como los oligopolios o los monopolios. Nuestros resultados indican que el aumento de la concentración industrial tiene un efecto de sustitución de importaciones, puesto que reduce la participación de insumos importados contenida en las exportaciones.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract We examine the indicators of vertical specialization when the level of industrial concentration changes for a collection of countries included in the Organization for Economic Cooperation and Development (OECD) input-output tables. For this, we propose a methodological strategy that integrates industrial concentration within a non-linear version of the input-output model. As is well known, the input­output model assumes free competition because, by taking a linear structure, the model does not consider concentrated market structures such as oligopolies or monopolies. Our results indicate that the increase in industrial concentration has an import substitution effect since it reduces the share of imported inputs in exports.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Industrial concentration]]></kwd>
<kwd lng="en"><![CDATA[nonlinear input-output model]]></kwd>
<kwd lng="en"><![CDATA[vertical specialization]]></kwd>
<kwd lng="es"><![CDATA[concentración industrial]]></kwd>
<kwd lng="es"><![CDATA[modelo de insumo-producto no lineal]]></kwd>
<kwd lng="es"><![CDATA[especialización vertical]]></kwd>
</kwd-group>
</article-meta>
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