<?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>0187-7372</journal-id>
<journal-title><![CDATA[Frontera norte]]></journal-title>
<abbrev-journal-title><![CDATA[Frontera norte]]></abbrev-journal-title>
<issn>0187-7372</issn>
<publisher>
<publisher-name><![CDATA[El Colegio de la Frontera Norte A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0187-73722026000100104</article-id>
<article-id pub-id-type="doi">10.33679/rfn.v.e2431</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Municipios y condados de la frontera México-Estados Unidos: cambios en la población, 2000-2020]]></article-title>
<article-title xml:lang="en"><![CDATA[Municipalities and Counties on the Mexico-United States Border: Population Changes, 2000-2020]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ybañez Zepeda]]></surname>
<given-names><![CDATA[Elmyra]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rosales]]></surname>
<given-names><![CDATA[Evelyne]]></given-names>
</name>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,El Colegio de la Frontera Norte  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2026</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2026</year>
</pub-date>
<volume>38</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-73722026000100104&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-73722026000100104&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-73722026000100104&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Se analizan las dinámicas poblacionales contrastantes en cinco pares condado/municipio de la frontera México-Estados Unidos entre 2000 y 2020. El objetivo es comparar los cambios en volumen y estructura por grandes grupos de edad, así como la evolución de la población de origen mexicano en los condados estadounidenses. La metodología se basa en el análisis comparativo de los censos poblacionales de ambos países (2000, 2010 y 2020), utilizando una definición operativa de región fronteriza centrada en pares urbanos de alta concentración demográfica. Los resultados muestran una desaceleración del crecimiento en la segunda década, un envejecimiento más avanzado en los condados estadounidenses y un incremento sostenido de la población de origen mexicano. El estudio se concentra en cinco pares urbanos, lo que no captura plenamente la heterogeneidad rural fronteriza. Se concluye que estas transformaciones demográficas conllevan importantes implicaciones económicas y políticas binacionales, reafirmando la relevancia estratégica del análisis demográfico fronterizo.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract This article analyzes contrasting population dynamics across five county/municipality pairs along the Mexico-U.S. border between 2000 and 2020. The objective is to compare changes in population size and structure by major age groups, as well as the evolution of Mexican-origin population in U.S. border counties. The methodology relies on a comparative analysis of the 2000, 2010, and 2020 population censuses of both countries, employing an operational definition of the border region centered on highly urbanized county/municipality pairs. The findings indicate a deceleration in population growth during the second decade, more advanced aging patterns on the U.S. side, and a sustained increase in the Mexican origin population. A limitation of the study is its focus on five predominantly urban pairs, which does not fully capture rural border heterogeneity. It concludes that these demographic transformations carry significant binational economic and political implications, reaffirming the strategic relevance of border demographic analysis.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[población]]></kwd>
<kwd lng="es"><![CDATA[crecimiento]]></kwd>
<kwd lng="es"><![CDATA[frontera]]></kwd>
<kwd lng="es"><![CDATA[condado/municipio]]></kwd>
<kwd lng="es"><![CDATA[México-Estados Unidos]]></kwd>
<kwd lng="en"><![CDATA[population]]></kwd>
<kwd lng="en"><![CDATA[growth]]></kwd>
<kwd lng="en"><![CDATA[borders]]></kwd>
<kwd lng="en"><![CDATA[county/municipality]]></kwd>
<kwd lng="en"><![CDATA[Mexico-United States]]></kwd>
</kwd-group>
</article-meta>
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