<?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>0187-0173</journal-id>
<journal-title><![CDATA[Sociológica (México)]]></journal-title>
<abbrev-journal-title><![CDATA[Sociológica (Méx.)]]></abbrev-journal-title>
<issn>0187-0173</issn>
<publisher>
<publisher-name><![CDATA[Universidad Autónoma Metropolitana, División de Ciencias Sociales y Humanidades]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0187-01732006000200135</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[La segmentación territorial de la competencia interpartidaria. Bastiones y distritos disputados en México, 1997-2003]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pacheco Méndez]]></surname>
<given-names><![CDATA[Guadalupe]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma Metropolitana  ]]></institution>
<addr-line><![CDATA[Xochimilco ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2006</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2006</year>
</pub-date>
<volume>21</volume>
<numero>61</numero>
<fpage>135</fpage>
<lpage>163</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-01732006000200135&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-01732006000200135&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-01732006000200135&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Entre 1997 y 2003, el incremento de la competitividad del sistema de partidos en México propició un aumento del número de distritos electorales disputados que presentan alternancia del partido ganador. Además, ya no sólo el PRI cuenta con bastiones indisputados, sino también el PAN y el PRD. Estos dos tipos de distritos, disputados y bastiones, se distribuyen de forma desigual entre las diversas regiones del territorio nacional, imprimiéndole un carácter segmentado territorialmente al juego nacional de partidos. En este proceso, la volatilidad electoral jugó un papel crucial, en tanto que el PRI mantuvo estable su base electoral.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Between 1997 and 2003, the increased competitiveness of Mexico&#8217;s party system led to a greater number of disputed electoral districts where the parties alternated in office. In addition, the PRI was no longer the only party that had undisputed bastions; the PAN and the PRD now had them also. These two types of districts, those that were disputed and those that were bastions, are distributed unevenly throughout the country. This makes the national play of the parties territorially segmented. Electoral volatility played a crucial role in this process while the PRI maintained a stable electoral constituency.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[distritos disputados]]></kwd>
<kwd lng="es"><![CDATA[distritos bastiones]]></kwd>
<kwd lng="es"><![CDATA[volatilidad]]></kwd>
<kwd lng="es"><![CDATA[victorias distritales]]></kwd>
<kwd lng="es"><![CDATA[alternancia]]></kwd>
<kwd lng="en"><![CDATA[disputed districts]]></kwd>
<kwd lng="en"><![CDATA[bastion districts]]></kwd>
<kwd lng="en"><![CDATA[volatility]]></kwd>
<kwd lng="en"><![CDATA[district victories]]></kwd>
<kwd lng="en"><![CDATA[alternation]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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