<?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>S2448-718X2011000200343</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Análisis por cohortes de la participación laboral en México (1987-2009)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Duval Hernández]]></surname>
<given-names><![CDATA[Robert]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Orraca Romano]]></surname>
<given-names><![CDATA[Pedro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Centro de Investigación y Docencia Económicas (CIDE)  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Carlos III de Madrid  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Spain</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2011</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2011</year>
</pub-date>
<volume>78</volume>
<numero>310</numero>
<fpage>343</fpage>
<lpage>375</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2448-718X2011000200343&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2448-718X2011000200343&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2448-718X2011000200343&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Este artículo descompone la participación en la fuerza laboral, la tasa de desempleo y la composición sectorial del empleo (autoempleo, empleo asalariado en el sector informal y empleo asalariado en el sector formal) en efectos de edad, cohorte y tiempo. La participación en la fuerza laboral y el empleo formal siguen un perfil de U invertida a lo largo del ciclo de vida. Los trabajadores más jóvenes son más proclives a participar en el sector informal asalariado, mientras que el autoempleo crece monotónicamente con la edad. Sin embargo, también se observa una participación significativa de personas poco calificadas de edad avanzada y mujeres en el sector del trabajo informal asalariado. Se observan importantes fluctuaciones contracíclicas del empleo asalariado informal, mientras que ocurre lo opuesto con el empleo formal. Las fluctuaciones del autoempleo son contracíclicas con un rezago. Encontramos un efecto de "trabajador añadido" entre las mujeres poco calificadas sólo durante receciones severas. Los efectos generacionales de largo plazo muetran un incremento paulatino en la participación laboral en el sector informal asalariado, con un correspondiente declive en el sector formal entre las generaciones más jóvenes. Se analiza algunas explicaciones preliminares de este fenómeno.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract This paper decomposes labor force participation, the unemployment rate, and the employment shares of self-employment, and of the formal and informal salaried sectors into age, cohort, and time effects. The life cycle patterns of labor force participation and formal employment follow a standard inverted U-shape. Younger workers are more likely to participate in the informal salaried sector, while self-employment increases monotonically with age. However, significant informal salaried employment is also observed among older unskilled workers and women. Strong countercyclical variations are observed for the informal salaried sector, while the opposite occurs for the formal sector. Self-employment fluctuations are countercyclical with a lag. We find an "added worker" effect only during severe recessions among unskilled women. Long-run generational effects show a steadily rising participation in the informal sector with a corresponding decline in formality among newer generations of salaried workers. Some preliminary explanations for this fact are discussed.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[composición de la fuerza laboral]]></kwd>
<kwd lng="es"><![CDATA[sector informal]]></kwd>
<kwd lng="es"><![CDATA[América Latina]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Earnings Mobility and Measurement Error: A Pseudo-Panel Approach]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Antman]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[McKenzie]]></surname>
<given-names><![CDATA[D. J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Economic Development and Cultural Change]]></source>
<year>2007</year>
<volume>56</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>125-61</page-range></nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Poverty Traps and Nonlinear Income Dynamics with Measurement Error and Individual Heterogeneity]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Antman]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[McKenzie]]></surname>
<given-names><![CDATA[D. J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Journal of Development Studies]]></source>
<year>2007</year>
<volume>43</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>1057-83</page-range></nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="book">
<collab>Banco Interamericano de Desarrollo</collab>
<source><![CDATA[Good Jobs Wanted: Labor Markets in Latin America]]></source>
<year>2003</year>
<publisher-loc><![CDATA[Washington ]]></publisher-loc>
<publisher-name><![CDATA[Banco Interamericano de Desarrollo]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Evolution of the Female Labor Force Participation Rate in Canada, 1976-1994: A Cohort Analysis]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Beaudry]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Lemieux]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
</person-group>
<source><![CDATA[Canadian Business Economics]]></source>
<year>1999</year>
<volume>7</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>57-70</page-range></nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Blank]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Gelbach]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Are Less-Educated Women Crowding Less-Educated Men Out of the Labor Market?]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Mincy]]></surname>
<given-names><![CDATA[R. B.]]></given-names>
</name>
</person-group>
<source><![CDATA[Black Males Left Behind]]></source>
<year>2006</year>
<publisher-loc><![CDATA[Washington ]]></publisher-loc>
<publisher-name><![CDATA[Urban Institute Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bosch]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Maloney]]></surname>
<given-names><![CDATA[W. F.]]></given-names>
</name>
</person-group>
<source><![CDATA[Cyclical Movements in Unemployment and Informality in Developing Countries]]></source>
<year>2008</year>
</nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Comparative Analysis of Labor Market Dynamics Using Markov Processes: An Application to Informality]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bosch]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Labour Economics]]></source>
<year>2010</year>
<volume>17</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>621-31</page-range></nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cahuc]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Zylberberg]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Labor Economics]]></source>
<year>2004</year>
<publisher-loc><![CDATA[Cambridge, Mass. ]]></publisher-loc>
<publisher-name><![CDATA[The MIT Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="">
<article-title xml:lang=""><![CDATA[Unemployment Dynamics in Mexico: Can Micro-Data Shed Light on the Controversy of Labor Market Segmentation in Developing Countries?]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Calderón Madrid]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[]]></source>
<year>2008</year>
</nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Charmes]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A Critical Review of Concepts, Definitions, and Studies in the Informal Sector]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Turnham]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Salomé]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Schwarz]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[The Informal Sector Revisited]]></source>
<year>1990</year>
<publisher-loc><![CDATA[París ]]></publisher-loc>
<publisher-name><![CDATA[OCDE]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B11">
<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[Baltimore ]]></publisher-loc>
<publisher-name><![CDATA[The Johns Hopkins University Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Deaton]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Paxson]]></surname>
<given-names><![CDATA[C. H.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Saving, Growth and Aging in Taiwan]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Wise]]></surname>
<given-names><![CDATA[D. A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Studies in the Economics of Aging]]></source>
<year>1994</year>
<publisher-loc><![CDATA[Chicago ]]></publisher-loc>
<publisher-name><![CDATA[Chicago University Press para la Agencia Nacional de Investigación Económica de los Estados Unidos]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Duval Hernández]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<source><![CDATA[Dynamics of Labor Market Earnings and Sector of Employment in Urban Mexico, 1987-2002]]></source>
<year>2006</year>
<publisher-name><![CDATA[Universidad de Cornell]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Rural-Urban Migration, Urban Unemployment and Underemployment, and Job Search Activity in LDCs]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fields]]></surname>
<given-names><![CDATA[G. S.]]></given-names>
</name>
</person-group>
<source><![CDATA[Journal of Development Economics]]></source>
<year>1975</year>
<numero>2</numero>
<issue>2</issue>
<page-range>165-88</page-range></nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fields]]></surname>
<given-names><![CDATA[G. S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Labor Market Modelling and the Urban Informal Sector: Theory and Evidence]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Turnham]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Salomé]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Schwarz]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[The Informal Sector Revisited]]></source>
<year>1990</year>
<publisher-loc><![CDATA[París ]]></publisher-loc>
<publisher-name><![CDATA[OCDE]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fields]]></surname>
<given-names><![CDATA[G. S.]]></given-names>
</name>
</person-group>
<source><![CDATA['Informality': It's Time to Stop Being Alice-in-Wonderland-ish]]></source>
<year>2008</year>
</nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[García]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Oliveira]]></surname>
<given-names><![CDATA[O. de]]></given-names>
</name>
</person-group>
<source><![CDATA[Trabajo femenino y vida familiar en México]]></source>
<year>1994</year>
<publisher-loc><![CDATA[México ]]></publisher-loc>
<publisher-name><![CDATA[El Colegio de México]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Mobility in the Urban Labor Market: a Panel Data Analysis for Mexico]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gong]]></surname>
<given-names><![CDATA[X.]]></given-names>
</name>
<name>
<surname><![CDATA[Soest]]></surname>
<given-names><![CDATA[A. van]]></given-names>
</name>
<name>
<surname><![CDATA[Villagómez]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Economic Development and Cultural Change]]></source>
<year>2004</year>
<numero>53</numero>
<issue>53</issue>
<page-range>1-36</page-range></nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hall]]></surname>
<given-names><![CDATA[R. E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The measurement of quality change from vintage price data]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Griliches]]></surname>
<given-names><![CDATA[Zvi]]></given-names>
</name>
</person-group>
<source><![CDATA[Price Indexes and Quality Change]]></source>
<year>1971</year>
<publisher-loc><![CDATA[Cambridge, Mass. ]]></publisher-loc>
<publisher-name><![CDATA[Harvard University Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Oferta laboral familiar y desempleo en México. Los efectos de la pobreza]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hernández]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<source><![CDATA[El Trimestre Económico]]></source>
<year>1997</year>
<volume>LXIV</volume>
<numero>256</numero>
<issue>256</issue>
<page-range>531-68</page-range></nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Killingsworth]]></surname>
<given-names><![CDATA[M. R.]]></given-names>
</name>
</person-group>
<source><![CDATA[Labor Supply]]></source>
<year>1983</year>
<publisher-loc><![CDATA[Nueva York ]]></publisher-loc>
<publisher-name><![CDATA[Cambridge University Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Levy]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<source><![CDATA[Good Intentions, Bad Outcomes. Social Policy, Informality, and Economic Growth in Mexico]]></source>
<year>2008</year>
<publisher-loc><![CDATA[Washington ]]></publisher-loc>
<publisher-name><![CDATA[Brookings Institution Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[The Added Worker Effect]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lundberg]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<source><![CDATA[Journal of Labor Economics]]></source>
<year>1985</year>
<volume>3</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>11-37</page-range></nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Informality Revisited]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Maloney]]></surname>
<given-names><![CDATA[W. F.]]></given-names>
</name>
</person-group>
<source><![CDATA[World Development]]></source>
<year>2004</year>
<volume>32</volume>
<numero>7</numero>
<issue>7</issue>
<page-range>1159-78</page-range></nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="">
<article-title xml:lang=""><![CDATA[Logit Analysis in a Rotating Panel Context and an Application to Self-Employment Decisions]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Maloney]]></surname>
<given-names><![CDATA[W. F.]]></given-names>
</name>
<name>
<surname><![CDATA[Aroca]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<source><![CDATA[]]></source>
<year>1999</year>
<numero>2069</numero>
<issue>2069</issue>
</nlm-citation>
</ref>
<ref id="B26">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[How do Households Cope with Aggregate Shocks? Evidence from the Mexican Peso Crisis]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[McKenzie]]></surname>
<given-names><![CDATA[D. J.]]></given-names>
</name>
</person-group>
<source><![CDATA[World Development]]></source>
<year>2003</year>
<numero>31</numero>
<issue>31</issue>
<page-range>1179-99</page-range></nlm-citation>
</ref>
<ref id="B27">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Disentangling Age, Cohort and Time Effects in the Additive Model]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[McKenzie]]></surname>
<given-names><![CDATA[D. J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Oxford Bulletin of Economics and Statistics]]></source>
<year>2006</year>
<volume>68</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>473-95</page-range></nlm-citation>
</ref>
<ref id="B28">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[A Simple, Positive-Definite, Heteroskedasticity and Autocorrelation Consistent Covariance Matrix]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Newey]]></surname>
<given-names><![CDATA[W. K.]]></given-names>
</name>
<name>
<surname><![CDATA[West]]></surname>
<given-names><![CDATA[K. D.]]></given-names>
</name>
</person-group>
<source><![CDATA[Econometrica]]></source>
<year>1987</year>
<volume>55</volume>
<page-range>703-8</page-range></nlm-citation>
</ref>
<ref id="B29">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[The added worker effect over the business cycle: evidence from urban Mexico]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Parker]]></surname>
<given-names><![CDATA[S. W.]]></given-names>
</name>
<name>
<surname><![CDATA[Skoufias]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Applied Economics Letters]]></source>
<year>2004</year>
<volume>11</volume>
<page-range>625-30</page-range></nlm-citation>
</ref>
<ref id="B30">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Perry]]></surname>
<given-names><![CDATA[G. E.]]></given-names>
</name>
<name>
<surname><![CDATA[Maloney]]></surname>
<given-names><![CDATA[W. F.]]></given-names>
</name>
<name>
<surname><![CDATA[Arias]]></surname>
<given-names><![CDATA[O. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Fajnzylber]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Mason]]></surname>
<given-names><![CDATA[A. D.]]></given-names>
</name>
<name>
<surname><![CDATA[Saavedra Chanduvi]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Informality: Exit and Exclusion]]></source>
<year>2007</year>
<publisher-loc><![CDATA[Washington ]]></publisher-loc>
<publisher-name><![CDATA[Banco Mundial]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B31">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Labor Force Participation of Mexican Elderly: The Importance of Health]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Van Gameren]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Estudios Económicos]]></source>
<year>2008</year>
<volume>23</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>89-127</page-range></nlm-citation>
</ref>
<ref id="B32">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[The Effect of Household Structure on Women's Economic Activity and Fertility: Evidence from Recent Mothers in Urban Mexico]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wong]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Levine]]></surname>
<given-names><![CDATA[R. E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Economic Development and Cultural Change]]></source>
<year>1992</year>
<volume>41</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>89-102</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
