<?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>S0185-16672003000300089</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Análisis de la polarización del ingreso de los hogares en México durante 1984-2000]]></article-title>
<article-title xml:lang="en"><![CDATA[Analysis of the Income Polarization of Homes in Mexico During the Period 1984-2000]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Huesca Reynoso]]></surname>
<given-names><![CDATA[Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Centro de Investigación en Alimentación y Desarrollo, A. C. Dirección de Desarrollo Regional Departamento de Economía]]></institution>
<addr-line><![CDATA[Hermosillo Sonora]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2003</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2003</year>
</pub-date>
<volume>62</volume>
<numero>246</numero>
<fpage>89</fpage>
<lpage>123</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0185-16672003000300089&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0185-16672003000300089&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0185-16672003000300089&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: El documento presenta una aplicación empírica del enfoque generado por Esteban, et al. (1999) para medir la polarización con el objetivo de cuantificar el deterioro de la clase media durante 1984-2000 en México. Se asume que la formación extrema de grupos en cualquier sociedad es determinada por el ingreso del hogar. Se utilizan las bases de datos desagregadas de la Encuesta Nacional de Ingresos y Gastos de los Hogares (ENIGH) en el cálculo de los índices, ajustando el ingreso familiar disponible con la escala de equivalencia de la OCDE, y se emplea la técnica de bootstraps en la inferencia. Los resultados indican un crecimiento de la polarización en el período, que desplaza la mayoría de los ingresos medios hacia niveles más bajos, y con menor intensidad, hasta los niveles más elevados. La participación de grupo sobre la clase media muestra una reducción que va de 40% en el año inicial a 34% en el último.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: This paper presents an empirical application of the Esteban, et al. (1999) approach to polarization, in order to determine the deterioration in the middle class in Mexico for the 1984-2000 period. It is assumed that the formation of extreme groups and the clustering process in every society are determined by household income. Micro-data from the National Survey of Household Income and Expenditure (ENIGH) is used in sequence, to compute polarization indices according to disposable household income adjusted according to the OECD equivalence scale and inference is made through bootstrap techniques. Findings show that polarization increased during this period, dragging most of the middle income bracket down towards the lower levels, and a smaller proportion up towards the top. According to data supplied by the middle class themselves, their group has shrunk from about 40% of the population in 1984 to 34% in 2000.]]></p></abstract>
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