<?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>0185-1667</journal-id>
<journal-title><![CDATA[Investigación económica]]></journal-title>
<abbrev-journal-title><![CDATA[Inv. Econ]]></abbrev-journal-title>
<issn>0185-1667</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Facultad de Economía]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0185-16672018000100079</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[¿Debe ser el cambio tecnológico ahorrador puro de trabajo en un modelo endógeno de crecimiento de la producción?]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez Vargas]]></surname>
<given-names><![CDATA[Armando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Márquez Estrada]]></surname>
<given-names><![CDATA[José]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Investigaciones Económicas ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2018</year>
</pub-date>
<volume>77</volume>
<numero>303</numero>
<fpage>79</fpage>
<lpage>93</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0185-16672018000100079&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0185-16672018000100079&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0185-16672018000100079&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: Los modelos existentes de producción no han profundizado en el análisis de las razones por las cuales el progreso técnico debería ser ahorrador puro de trabajo con base en modelos donde las innovaciones tecnológicas son consideradas endógenas. Así, con la finalidad de llenar este vacío en la literatura, en este artículo hacemos una deducción matemática de la generalización del teorema de Uzawa en el contexto de un modelo endógeno y discutir las implicaciones del mismo para la teoría del crecimiento económico. Se encontró, en contraste con el resultado clásico del teorema de Uzawa, que para que las innovaciones tecnológicas en el largo plazo sean ahorradoras puras de trabajo se necesita que el modelo cumpla las siguientes condiciones: 1) que la elasticidad de sustitución entre trabajo y capital sea menor que la unidad y 2) que la expansión de la frontera tecnológica se base sólo en el incremento de las innovaciones que ahorran trabajo en el largo plazo. En caso contrario, el cambio tecnológico será no solo ahorrador de trabajo, sino también ahorrador de capital.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: Existing production models have not deeply analyzed the reasons why technical progress should be pure labor-saving in the models that consider endogenous technological innovations. Thus, in order to fill this gap in the literature, we do a mathematical deduction of the generalization of Uzawa&#8217;s theorem in an endogenous model and discuss its implications in the economic growth theory. It was found that, contrasting the classical result of Uzawa&#8217;s theorem, in order for technological innovations in the long term to be purely labor-saving, the production model must have the following characteristics: 1) the elasticity of substitution between labor and capital must be less than one and 2) the expansion of the technological frontier must only due to the increase of innovations that save work in the long term. Otherwise, technological change will not only be work-saving, but also capital-saving.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[función de producción CES]]></kwd>
<kwd lng="es"><![CDATA[innovación tecnológica]]></kwd>
<kwd lng="es"><![CDATA[teorema de Uzawa]]></kwd>
<kwd lng="es"><![CDATA[senda de crecimiento balanceado]]></kwd>
<kwd lng="en"><![CDATA[Production function CES]]></kwd>
<kwd lng="en"><![CDATA[technological innovation]]></kwd>
<kwd lng="en"><![CDATA[Uzawa theorem]]></kwd>
<kwd lng="en"><![CDATA[balanced growth path]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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