<?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>2007-4018</journal-id>
<journal-title><![CDATA[Revista Chapingo serie ciencias forestales y del ambiente]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Chapingo ser. cienc. for. ambient]]></abbrev-journal-title>
<issn>2007-4018</issn>
<publisher>
<publisher-name><![CDATA[Universidad Autónoma Chapingo, Coordinación de Revistas Institucionales]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-40182017000200231</article-id>
<article-id pub-id-type="doi">10.5154/r.rchscfa.2016.06.041</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Analysis of methods to estimate the mean and variance of the willingness to pay: parametric and non-parametric case]]></article-title>
<article-title xml:lang="es"><![CDATA[Análisis de métodos para calcular la media y varianza de la disposición a pagar: el caso paramétrico y no paramétrico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Santiago]]></surname>
<given-names><![CDATA[Marco A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Meza-Herrera]]></surname>
<given-names><![CDATA[César A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Valdivia-Alcalá]]></surname>
<given-names><![CDATA[Ramón]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma Chapingo Unidad Regional Universitaria de Zonas Áridas ]]></institution>
<addr-line><![CDATA[Bermejillo Durango]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma Chapingo División de Ciencias Económico-Administrativas ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2017</year>
</pub-date>
<volume>23</volume>
<numero>2</numero>
<fpage>231</fpage>
<lpage>242</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-40182017000200231&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-40182017000200231&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-40182017000200231&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction: Contingent valuation (CVM) is the most significant direct method for estimating the total monetary value of ecosystem services.  Aims:  The parametric and non-parametric methods of estimation of the willingness to pay (WTP) were compared through the intervals of the mean, to give recommendations of use in the valuation of ecosystem services.  Materials and Methods:  In order to provide support for the comparison of the methods, two case studies that applied the CVM were used. Within the non-parametric approach, the mean and variance intervals obtained with the Boman, Bostedt and Kriström formulas were compared with those obtained by the Haab and McConnell method.  Results and Discussion:  The parametric and non-parametric methods can be used indistinctly to obtain the mean of the WTP, because no significant differences were observed among the estimated values. In non-parametric methods, the two approaches analyzed do not differ in the estimation of the mean, but there are differences when calculating the variances; the Haab and McConnell method generates relatively larger mean variances.  Conclusions:  It is recommended to use the non-parametric method as a complement or validation of the results of the parametric method, since the latter includes socioeconomic explanatory variables of the WTP.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción: La valoración contingente (MVC) es el método directo más significativo para calcular el valor monetario total de los servicios ecosistémicos.  Objetivos:  Los métodos paramétrico y no paramétrico de estimación de la disposición a pagar (DAP) se compararon a través de intervalos de la media, para dar recomendaciones de uso en la valoración de servicios ecosistémicos.  Materiales y métodos:  Para proveer soporte a la comparación de los métodos se utilizaron dos casos de estudio que aplicaron el MVC. Dentro del enfoque no paramétrico, los intervalos de la media y varianza obtenidos con las fórmulas de Boman, Bostedt y Kriström se compararon con los obtenidos por el método de Haab y McConnell.  Resultados y discusión:  Los métodos paramétrico y no paramétrico se pueden utilizar indistintamente para obtener la media de la DAP, debido a que no existieron diferencias significativas entre los valores estimados. En los métodos no paramétricos, los dos enfoques analizados no difieren en la estimación de la media, pero sí existen diferencias al momento de calcular las varianzas; el método de Haab y McConnell genera varianzas de la media relativamente más grandes.  Conclusiones:  Se recomienda utilizar el método no paramétrico como complemento o validación de los resultados del método paramétrico, dado que este último incluye variables socioeconómicas explicatorias de la DAP.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Contingent valuation method]]></kwd>
<kwd lng="en"><![CDATA[ecosystem services]]></kwd>
<kwd lng="en"><![CDATA[economic valuation]]></kwd>
<kwd lng="en"><![CDATA[natural resource economics]]></kwd>
<kwd lng="es"><![CDATA[Método de valoración contingente]]></kwd>
<kwd lng="es"><![CDATA[servicios ecosistémicos]]></kwd>
<kwd lng="es"><![CDATA[valoración económica]]></kwd>
<kwd lng="es"><![CDATA[economía de los recursos naturales]]></kwd>
</kwd-group>
</article-meta>
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