<?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>0186-7202</journal-id>
<journal-title><![CDATA[Estudios Económicos (México, D.F.)]]></journal-title>
<abbrev-journal-title><![CDATA[Estud. Econ. (México, D.F.)]]></abbrev-journal-title>
<issn>0186-7202</issn>
<publisher>
<publisher-name><![CDATA[El Colegio de México A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0186-72022020000100037</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Evolución temporal del impacto tecnológico de las patentes mexicanas: una aplicación del algoritmo de expectativas]]></article-title>
<article-title xml:lang="en"><![CDATA[Temporal evolution of the Technological impact of Mexican Patents: an application of the Expectation-maximization algorithm]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez Álvarez]]></surname>
<given-names><![CDATA[Aurora A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Terrazas Santamaría]]></surname>
<given-names><![CDATA[Diana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,El Colegio de México  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2020</year>
</pub-date>
<volume>35</volume>
<numero>1</numero>
<fpage>37</fpage>
<lpage>69</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0186-72022020000100037&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0186-72022020000100037&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0186-72022020000100037&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: En este art&#305;&#769;culo se utiliza la metodolog&#305;&#769;a de Clarkson et al. (2007) para analizar el patro&#769;n de citas de patentes mexicanas registradas en Estados Unidos en 1968-2017. Con base en un algoritmo de maximizacio&#769;n de expectativas y las citas posteriores de las patentes como indicador de su utilidad, encontramos tres grupos de perfiles distintos: el &#8220;ra&#769;pido&#8221; recibe el mayor nu&#769;mero de citas en una etapa muy temprana de su vida (5 an&#771;os) comparado con el &#8220;medio&#8221; (10) y el &#8220;lento&#8221; (20). Adema&#769;s, el grupo &#8220;ra&#769;pido&#8221; se asocia a patentes ma&#769;s recientes, menor proporcio&#769;n de duen&#771;os e inventores mexicanos y mayor valor econo&#769;mico.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: In this paper, we use the methodology of Clarkson et al. (2007) to analyze the patterns of citations of Mexican patents registered during 1968-2017 in the United States. Using an expectation-maximization algorithm and patent citations as an indicator of their utility, we find three groups of different citation pattern profiles: &#8220;Fast&#8221; receives the highest number of citations at a very early stage of their life (5 years), compared to &#8220;Medium&#8221; (10) and &#8220;Slow&#8221; (20). Moreover, the group &#8220;Fast&#8221; is associated with the most recent patents, with the lowest proportion of Mexican owners and inventors, and the highest economic value.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[patentes]]></kwd>
<kwd lng="es"><![CDATA[impacto tecnolo&#769;gico]]></kwd>
<kwd lng="es"><![CDATA[redes]]></kwd>
<kwd lng="es"><![CDATA[algoritmo de maximizacio&#769;n de expectativas]]></kwd>
<kwd lng="es"><![CDATA[O31]]></kwd>
<kwd lng="es"><![CDATA[O33]]></kwd>
<kwd lng="es"><![CDATA[D89]]></kwd>
<kwd lng="en"><![CDATA[innovacio&#769;n]]></kwd>
<kwd lng="en"><![CDATA[patents]]></kwd>
<kwd lng="en"><![CDATA[technological impact]]></kwd>
<kwd lng="en"><![CDATA[networks]]></kwd>
<kwd lng="en"><![CDATA[expectation-maximization algorithm]]></kwd>
<kwd lng="en"><![CDATA[innovation]]></kwd>
<kwd lng="en"><![CDATA[O31]]></kwd>
<kwd lng="en"><![CDATA[O33]]></kwd>
<kwd lng="en"><![CDATA[D89]]></kwd>
</kwd-group>
</article-meta>
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