<?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>2448-6655</journal-id>
<journal-title><![CDATA[Análisis económico]]></journal-title>
<abbrev-journal-title><![CDATA[Anál. econ.]]></abbrev-journal-title>
<issn>2448-6655</issn>
<publisher>
<publisher-name><![CDATA[Universidad Autónoma Metropolitana, Unidad Azcapotzalco, División de Ciencias Sociales y Humanidades]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2448-66552020000100183</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Informality in the Metropolitan Zone of the Valley of Mexico (ZMVM): a spatial econometric and quantile error analysis]]></article-title>
<article-title xml:lang="es"><![CDATA[Informalidad en la Zona Metropolitana del Valle de México (ZMVM): un análisis econométrico espacial y de error cuantil]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Robles-Ortiz]]></surname>
<given-names><![CDATA[David]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez-Silva]]></surname>
<given-names><![CDATA[Roberto Alejandro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Politécnico Nacional Escuela Superior de Economía ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Politécnico Nacional Escuela Superior de Economía ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2020</year>
</pub-date>
<volume>35</volume>
<numero>88</numero>
<fpage>183</fpage>
<lpage>208</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2448-66552020000100183&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2448-66552020000100183&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2448-66552020000100183&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The objective of this research is to analyze the behavior of the main causes of informality and its spatial relationship in the Metropolitan Zone of the Valley of Mexico (ZMVM). To achieve the target, we use the methodology of spatial econometrics, we propose a quantile error from a weight matrix (W). The results found show that neighborhood effects do not explain the informality within the ZMVM moreover, the education variable has a negative impact on informality. The originality of this work is the spatial econometric analysis of the spatial relationship in informality within the ZMVM. One of the main limitations of the present investigation is that it only covers 67% of the total ZMVM localities. The conclusion that emerges from this research is the educational factor is a crucial variable in the reduction of informality in the analyzed area and there is not strong evidence about contagion of informality between municipalities. It is recommended to focus efforts to analyze other metropolitan areas, which present the same problem of informality.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El objetivo de esta investigación es analizar el comportamiento de las principales causas de informalidad y su relación espacial en la Zona Metropolitana del Valle de México (ZMVM). Para lograr el objetivo, utilizamos la metodología de la econometría espacial, proponemos un error cuantil de una matriz de peso (W). Los resultados encontrados muestran que los efectos del vecindario no explican la informalidad dentro del ZMVM, además, la variable educativa tiene un impacto negativo en la informalidad. La originalidad de este trabajo es el análisis econométrico espacial de la relación espacial en la informalidad dentro de la ZMVM. Una de las principales limitaciones de la presente investigación es que solo cubre el 67% del total de las localidades de ZMVM. La conclusión que surge de esta investigación es que el factor educativo es una variable crucial en la reducción de la informalidad en el área analizada y no existe evidencia sólida sobre el contagio de la informalidad entre los municipios. Se recomienda concentrar los esfuerzos para analizar otras áreas metropolitanas, que presentan el mismo problema de informalidad.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Informality]]></kwd>
<kwd lng="en"><![CDATA[spatial econometrics]]></kwd>
<kwd lng="en"><![CDATA[matrix of weights (W)]]></kwd>
<kwd lng="en"><![CDATA[and quantile error]]></kwd>
<kwd lng="es"><![CDATA[Informalidad]]></kwd>
<kwd lng="es"><![CDATA[econometría espacial]]></kwd>
<kwd lng="es"><![CDATA[matriz de ponderaciones (W) y error cuantil]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Anselin]]></surname>
<given-names><![CDATA[Luc]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Lagrange Multiplier Test Diagnostics for Spatial Dependence and Spatial Heterogeinity]]></article-title>
<source><![CDATA[Geographical Analysis]]></source>
<year>1988</year>
<volume>20</volume>
<numero>1</numero>
<issue>1</issue>
</nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Anselin]]></surname>
<given-names><![CDATA[Luc]]></given-names>
</name>
</person-group>
<source><![CDATA[Spatial Econometric: Methods and Models]]></source>
<year>1988</year>
<publisher-loc><![CDATA[London ]]></publisher-loc>
<publisher-name><![CDATA[Kluwer Academic Publisher]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Baltagi]]></surname>
<given-names><![CDATA[Badi H.]]></given-names>
</name>
</person-group>
<source><![CDATA[A Companion to Theoretical Econometrics]]></source>
<year>2003</year>
<publisher-loc><![CDATA[Malden, MA. ]]></publisher-loc>
<publisher-name><![CDATA[Blackwell Publishing Ltd]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Berndt]]></surname>
<given-names><![CDATA[Ernst R.]]></given-names>
</name>
<name>
<surname><![CDATA[Hall]]></surname>
<given-names><![CDATA[Bronwyn]]></given-names>
</name>
<name>
<surname><![CDATA[Hall]]></surname>
<given-names><![CDATA[Robert]]></given-names>
</name>
<name>
<surname><![CDATA[Hausman]]></surname>
<given-names><![CDATA[Jerry]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Estimation and Inference in Nonlinear Structural Models]]></article-title>
<source><![CDATA[Annals of Economic and Social Measurement]]></source>
<year>1974</year>
<volume>3</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>653-65</page-range><publisher-name><![CDATA[National Bureau of Economic Research, Inc.]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bonilla]]></surname>
<given-names><![CDATA[R. R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Informalidad y precariedad laboral en el Distrito Federal. La economía de sobrevivencia]]></article-title>
<source><![CDATA[Economía Informa]]></source>
<year>2015</year>
<numero>391</numero>
<issue>391</issue>
</nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Brandt]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Informality in Mexico]]></article-title>
<source><![CDATA[OECD Economics Department Working Papers]]></source>
<year>2011</year>
<numero>896</numero>
<issue>896</issue>
<publisher-loc><![CDATA[Paris ]]></publisher-loc>
<publisher-name><![CDATA[OECD Publishing]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Castells]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<source><![CDATA[The informational City. Information Technology, Economic Restructuring and the Urban - Regional Process]]></source>
<year>1989</year>
<publisher-loc><![CDATA[Oxford, UK ]]></publisher-loc>
<publisher-name><![CDATA[Basil Blackwell]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cunningham]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Breadwinner versus caregiver: Labor force participation and sectoral choice over the Mexican business cycle]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Katz]]></surname>
<given-names><![CDATA[Elizabeth G.]]></given-names>
</name>
<name>
<surname><![CDATA[Correia]]></surname>
<given-names><![CDATA[Maria C.]]></given-names>
</name>
</person-group>
<source><![CDATA[The economics of gender in Mexico: Work, family, state, and market]]></source>
<year>2001</year>
<publisher-loc><![CDATA[Washington, DC ]]></publisher-loc>
<publisher-name><![CDATA[The World Bank]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Deaton]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[The analysis of household surveys: a microeconometric approach to development policy]]></source>
<year>1997</year>
<publisher-loc><![CDATA[Washington, DC ]]></publisher-loc>
<publisher-name><![CDATA[The World Bank]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="book">
<collab>Environmental Systems Research Institute</collab>
<source><![CDATA[ARCGIS]]></source>
<year>2014</year>
<publisher-loc><![CDATA[California. USA ]]></publisher-loc>
<publisher-name><![CDATA[Redlands]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Escamilla]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Terciarización y segregación ocupacional en la periferia expandida de la Ciudad de México]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Aguilar]]></surname>
<given-names><![CDATA[Adrián G.]]></given-names>
</name>
</person-group>
<source><![CDATA[Las grandes aglomeraciones y su periferia regional. Experiencias en Latinoamérica y España]]></source>
<year>2006</year>
<publisher-loc><![CDATA[México ]]></publisher-loc>
<publisher-name><![CDATA[Instituto de Geografía, UNAM]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Flores]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Valero]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Evolución y causas de la informalidad en México]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Calva]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Reforma fiscal integral. Análisis estratégico para el desarrollo]]></source>
<year>2012</year>
<volume>5</volume>
<publisher-loc><![CDATA[México, D.F. ]]></publisher-loc>
<publisher-name><![CDATA[Juan Pablos Editor]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gong]]></surname>
<given-names><![CDATA[X.]]></given-names>
</name>
<name>
<surname><![CDATA[Van Soest]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Villagomez]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Mobility in the urban labor market: a panel data analysis for Mexico]]></article-title>
<source><![CDATA[Economic Development and Cultural Change]]></source>
<year>2004</year>
<volume>53</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>1-36</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Graizbord]]></surname>
<given-names><![CDATA[Boris]]></given-names>
</name>
</person-group>
<source><![CDATA[Geografía del transporte en el área metropolitana de la Ciudad de México]]></source>
<year>2008</year>
<publisher-loc><![CDATA[México ]]></publisher-loc>
<publisher-name><![CDATA[El Colegio de México A.C.]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Harris]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Todaro]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Migration, Unemployment and Development: A two-sector analysis]]></article-title>
<source><![CDATA[American Economic Review]]></source>
<year>1970</year>
<volume>60</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>126-42</page-range></nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="book">
<collab>INEGI</collab>
<source><![CDATA[Delimitación de las Zonas Metropolitanas de México]]></source>
<year>2010</year>
<publisher-loc><![CDATA[Aguascalientes, México ]]></publisher-loc>
<publisher-name><![CDATA[Instituto Nacional de Estadística y Geografía]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="">
<collab>INEGI</collab>
<source><![CDATA[Módulo de Condiciones Socioeconómicas. Encuesta Nacional de Ingresos y Gastos de los Hogares, 2014]]></source>
<year>2015</year>
<publisher-loc><![CDATA[Aguascalientes, México ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Iracheta Cenecorta]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Gobernabilidad en la zona metropolitana del valle de México]]></article-title>
<source><![CDATA[Papeles de población]]></source>
<year>2003</year>
<volume>9</volume>
<numero>36</numero>
<issue>36</issue>
<page-range>211-39</page-range></nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kelley]]></surname>
<given-names><![CDATA[C.T.]]></given-names>
</name>
</person-group>
<source><![CDATA[Iterative Methods of Optimization]]></source>
<year>1999</year>
<publisher-loc><![CDATA[Philadelphia ]]></publisher-loc>
<publisher-name><![CDATA[Society for Industrial and Applied Mathematics]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Koenker]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Bassett]]></surname>
<given-names><![CDATA[G. J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Regression quantiles]]></article-title>
<source><![CDATA[Econometrica]]></source>
<year>1978</year>
<volume>46</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>33-50</page-range></nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lütkepohl]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<source><![CDATA[Introduction to Multiple time Series Analysis]]></source>
<year>2006</year>
<publisher-loc><![CDATA[Berlin ]]></publisher-loc>
<publisher-name><![CDATA[Springer Verlag]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Moran]]></surname>
<given-names><![CDATA[P.A.P.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Notes on Continuos Stochastic Phenomena]]></article-title>
<source><![CDATA[Biometrica]]></source>
<year>1950</year>
<volume>37</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>17-23</page-range></nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="book">
<collab>OCDE</collab>
<source><![CDATA[Estudios económicos de la OCDE, México]]></source>
<year>1995</year>
<publisher-loc><![CDATA[París ]]></publisher-loc>
<publisher-name><![CDATA[Organización para la Cooperación y el Desarrollo Económicos]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="book">
<collab>OIT</collab>
<source><![CDATA[La medición de la Informalidad: Manual estadístico sobre el sector informal y el empleo informal]]></source>
<year>2013</year>
<publisher-loc><![CDATA[Ginebra ]]></publisher-loc>
<publisher-name><![CDATA[Organización Internacional del Trabajo]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="book">
<collab>OIT</collab>
<source><![CDATA[El empleo informal en México: situación actual, políticas y desafíos]]></source>
<year>2014</year>
<publisher-name><![CDATA[Programa de Promoción de la Formalización en América Latina y el Caribe (FORLAC). Organización Internacional del Trabajo]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B26">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pacheco Gómez Muñoz]]></surname>
<given-names><![CDATA[M. E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Ciudad de México, heterogénea y desigual un estudio sobre el mercado de trabajo]]></source>
<year>2004</year>
<publisher-loc><![CDATA[México ]]></publisher-loc>
<publisher-name><![CDATA[El Colegio de México]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B27">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pineda]]></surname>
<given-names><![CDATA[Pérez]]></given-names>
</name>
<name>
<surname><![CDATA[Jorge]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Econometría espacial y ciencia regional]]></article-title>
<source><![CDATA[Investigación Económica]]></source>
<year>2006</year>
<volume>LXV</volume>
<numero>258</numero>
<issue>258</issue>
<page-range>129-60</page-range></nlm-citation>
</ref>
<ref id="B28">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Perrot]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Les nouvelles théories du marché du travail]]></source>
<year>1995</year>
<publisher-loc><![CDATA[Paris ]]></publisher-loc>
<publisher-name><![CDATA[La Découverte]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B29">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Perry]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<source><![CDATA[Informalidad: escape y exclusión: Salida y exclusión]]></source>
<year>2007</year>
<publisher-loc><![CDATA[Washington, DC ]]></publisher-loc>
<publisher-name><![CDATA[Banco Mundial]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B30">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pinto]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Naturaleza e implicaciones de la heterogeneidad estructural de la América Latina]]></article-title>
<source><![CDATA[El Trimestre Económico]]></source>
<year>1970</year>
<volume>37</volume>
<numero>145</numero>
<issue>145</issue>
<page-range>83-100</page-range></nlm-citation>
</ref>
<ref id="B31">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Schneider]]></surname>
<given-names><![CDATA[Friedrich]]></given-names>
</name>
<name>
<surname><![CDATA[Buehn]]></surname>
<given-names><![CDATA[Andreas]]></given-names>
</name>
<name>
<surname><![CDATA[Montenegro]]></surname>
<given-names><![CDATA[Claudio E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Shadow economies all over the world: new estimates for 162 countries from 1999 to 2007]]></source>
<year>2010</year>
<publisher-loc><![CDATA[Washington, DC ]]></publisher-loc>
<publisher-name><![CDATA[World Bank]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B32">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pradilla Cobos]]></surname>
<given-names><![CDATA[Emilio]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Metropolitan Area in the Mexico Valley: Megacity without planning]]></article-title>
<source><![CDATA[Ciudades]]></source>
<year>2005</year>
<numero>9</numero>
<issue>9</issue>
<page-range>83-104</page-range></nlm-citation>
</ref>
<ref id="B33">
<nlm-citation citation-type="">
<collab>SAS Institute Inc.</collab>
<source><![CDATA[SAS]]></source>
<year>2014</year>
<publisher-loc><![CDATA[Cary, NC, USA ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B34">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sassen]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<source><![CDATA[The Global City]]></source>
<year>1991</year>
<publisher-loc><![CDATA[New York, London ]]></publisher-loc>
<publisher-name><![CDATA[Princeton University Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B35">
<nlm-citation citation-type="">
<collab>Stata Corp LLC.</collab>
<source><![CDATA[Stata, V. 12]]></source>
<year>2012</year>
<publisher-loc><![CDATA[Texas, USA ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B36">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Tokman]]></surname>
<given-names><![CDATA[V. E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[El sector informal: quince años después]]></article-title>
<source><![CDATA[El Trimestre Económico]]></source>
<year>1987</year>
<volume>54</volume>
<numero>215</numero>
<issue>215</issue>
<page-range>513-36</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
