<?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>2448-718X</journal-id>
<journal-title><![CDATA[El trimestre económico]]></journal-title>
<abbrev-journal-title><![CDATA[El trimestre econ]]></abbrev-journal-title>
<issn>2448-718X</issn>
<publisher>
<publisher-name><![CDATA[Fondo de Cultura Económica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2448-718X2007000100123</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Refuerzo escolar para niños pobres: ¿funciona?]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Contreras]]></surname>
<given-names><![CDATA[Dante]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Herrera]]></surname>
<given-names><![CDATA[Rodrigo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Chile Departamento de Economía ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Chile</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2007</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2007</year>
</pub-date>
<volume>74</volume>
<numero>293</numero>
<fpage>123</fpage>
<lpage>159</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2448-718X2007000100123&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2448-718X2007000100123&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2448-718X2007000100123&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: Este artículo evalúa el efecto del Programa de Reforzamiento Escolar que Un Techo Para Chile aplica en campamentos de la región metropolitana. Los datos utilizados son extraídos de una encuesta especialmente elaborada por los autores para el desarrollo de este estudio. Se estima el efecto del programa en alumnos de bajos ingresos que asisten a la escuela primaria. Dichos efectos corresponden a un aumento en las calificaciones de matemáticas y castellano en el periodo académico 2004-2003. El efecto del programa es estimado mediante técnicas paramétricas. Posteriormente, la solidez de los resultados se examina por medio de estimaciones no paramétricas con distintos grupos de control. Los principales resultados sugieren que existe suficiente prueba estadística para determinar que el programa tiene un efecto positivo en las calificaciones de los alumnos. Este efecto se encuentra en un intervalo de 1.8 y 5.3 décimas para matemáticas; para castellano, en un rango que fluctúa entre 2.2 y 9.7 décimas. Además, el estudio muestra que las calificaciones que obtuvieron los alumnos en 2003 no determinaron su participación en el programa durante 2004.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: This paper examines the impact of the school reinforcement program that &#8220;Un Techo Para Chile&#8221; offers to the poorest communities in the Metropolitan Region, in Chile. The data were taken from a survey specially designed by the authors. The effects of the program on low-income students at tending elementary education show an increase in mathematics and language grades during the academic period 2004-2003. The impact of the program is estimated using parametric methods. The robustness of the results is analyzed with non-parametric estimations and using different control groups. The main results indicate that the program has a positive impact on student&#8217;s grades. In addition, the grades obtained in 2003 did not determine student&#8217;s participation in the program during 2004.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[refuerzo escolar]]></kwd>
<kwd lng="es"><![CDATA[extrema pobreza]]></kwd>
<kwd lng="es"><![CDATA[experimentos naturales]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Abadie]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Semiparametric Difference-in-Differences Estimators]]></source>
<year>2003</year>
<publisher-name><![CDATA[Universidad de Harvard]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Baker]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Evaluating the Impact of Development Projects on Poverty. A Handbook for Practitioners]]></source>
<year>2000</year>
<publisher-loc><![CDATA[Washington ]]></publisher-loc>
<publisher-name><![CDATA[Banco Mundial]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Becker]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Ichino]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Estimation of Average Treatment Effects Based on Propensity Scores]]></article-title>
<source><![CDATA[The Stata Journal]]></source>
<year>2002</year>
<volume>2</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>358-77</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Blundell]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Costa-Dias]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Alternative Approaches to Evaluation in Empirical Microeconomics]]></source>
<year>2002</year>
<numero>CWP10/02</numero>
<issue>CWP10/02</issue>
<publisher-name><![CDATA[University College London]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bryson]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Dorsett]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Purdon]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<source><![CDATA[The Use of Propensity Score Matching in the Evaluation of Active Labour Market Policies]]></source>
<year>2002</year>
<volume>4</volume>
<publisher-name><![CDATA[Department for Work and Pensions]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Casen]]></surname>
</name>
</person-group>
<source><![CDATA[Encuesta de Caracterización Socioeconómica Nacional]]></source>
<year>2003</year>
<publisher-name><![CDATA[Ministerio de Planificación (Mideplan)]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Contreras]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Garcés]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Para erradicar definitivamente los campamentos de Chile]]></article-title>
<source><![CDATA[Revista Economía &amp; Administración]]></source>
<year>2002</year>
<volume>143</volume>
</nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cortese]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Taller vivienda elemental]]></article-title>
<source><![CDATA[ARQ]]></source>
<year>2004</year>
<volume>57</volume>
<page-range>50-1</page-range><publisher-loc><![CDATA[Santiago ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Dean]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Serle]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Galda]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Heyneman]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Improving Elementary Mathematics Education in Nicaragua: An Experimental Study of the Impact of Textbooks and Radio on Achievement]]></article-title>
<source><![CDATA[Journal of Educational Psychology]]></source>
<year>1981</year>
<volume>73</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>556-67</page-range></nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Dehejia]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Practical Propensity Score Matching: A Reply to Smith and Todd]]></article-title>
<source><![CDATA[Journal of Econometrics]]></source>
<year>2005</year>
<volume>125</volume>
<numero>1-2</numero>
<issue>1-2</issue>
<page-range>355-64</page-range></nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Dehejia]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Wahba]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<source><![CDATA[Propensity Score Matching Methods for Non-Experimental Causal Studies]]></source>
<year>1998</year>
<numero>6829</numero>
<issue>6829</issue>
<publisher-name><![CDATA[National Bureau of Economic Research]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Elacqua]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Fabrega]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<source><![CDATA[El consumidor de la educación: El actor olvidado de la libre elección de colegios en Chile]]></source>
<year>2004</year>
<publisher-name><![CDATA[Escuela de Gobierno, Universidad Adolfo Ibáñez]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Espinoza]]></surname>
<given-names><![CDATA[V.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Contactos sociales y carreras laborales en familias chilenas de escasos recursos]]></article-title>
<source><![CDATA[Proposiciones]]></source>
<year>2001</year>
<volume>32</volume>
<publisher-loc><![CDATA[Santiago ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Flores]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Tessara]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<source><![CDATA[Dinámica de la pobreza en campamentos de la región metropolitana]]></source>
<year>2003</year>
<publisher-name><![CDATA[Un Techo Para Chile]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Glewwe]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Mihael]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Sylvie]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Textbooks and Test Score: Evidence from a Prospective Evaluation in Kenya]]></source>
<year>2000</year>
<publisher-loc><![CDATA[Washington ]]></publisher-loc>
<publisher-name><![CDATA[Banco Mundial, Development Research Group]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="">
<collab>Gobierno de Chile</collab>
<source><![CDATA[Discurso presidencial 21 de mayo]]></source>
<year>2004</year>
</nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Greene]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
</person-group>
<source><![CDATA[Análisis econométrico]]></source>
<year>1999</year>
<edition>tercera</edition>
<publisher-loc><![CDATA[España ]]></publisher-loc>
<publisher-name><![CDATA[Editorial Prentice Hall]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Heckman]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Ichimura]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Todd]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Characterizing Selection Bias Using Experimental Data]]></article-title>
<source><![CDATA[Econometrica]]></source>
<year>1998</year>
<volume>66</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>1017-98</page-range></nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hirano]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Imbens]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Ridder]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<source><![CDATA[Efficient Estimation of Average Treatment Effects Using the Estimated Propensity Score]]></source>
<year>2000</year>
<numero>0251</numero>
<issue>0251</issue>
<publisher-name><![CDATA[National Bureau of Economic Research, Inc.]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="">
<collab>Hogar de Cristo (HC)</collab>
<source><![CDATA[]]></source>
<year>2004</year>
</nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="">
<collab>Instituto Nacional de Estadísticas (INE)</collab>
<source><![CDATA[Censo 2002]]></source>
<year>2002</year>
</nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jee-Peng]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Lane]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Lassibille]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Outcomes in Philippine Elementary Schools: An Evaluation of Four Experiments]]></article-title>
<source><![CDATA[World Bank Economic Review]]></source>
<year>1999</year>
<volume>13</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>493-508</page-range></nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="">
<collab>Ministerio de Vivienda y Urbanismo (Minvu)</collab>
<source><![CDATA[]]></source>
<year></year>
</nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rivadeneira]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Brain]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
<name>
<surname><![CDATA[Hurtado]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<source><![CDATA[Historias de campamentos]]></source>
<year>2004</year>
<publisher-name><![CDATA[Un Techo Para Chile]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Smith]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Todd]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Reconciling Conflicting Evidence on the Performance of Propensity-Score Matching Methods]]></article-title>
<source><![CDATA[American Economic Review]]></source>
<year>2001</year>
<volume>91</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>112-8</page-range></nlm-citation>
</ref>
<ref id="B26">
<nlm-citation citation-type="">
<collab>Un Techo Para Chile</collab>
<source><![CDATA[Catastro nacional de campamentos de Un Techo Para Chile]]></source>
<year>2003</year>
</nlm-citation>
</ref>
</ref-list>
</back>
</article>
