<?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>0186-1042</journal-id>
<journal-title><![CDATA[Contaduría y administración]]></journal-title>
<abbrev-journal-title><![CDATA[Contad. Adm]]></abbrev-journal-title>
<issn>0186-1042</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Facultad de Contaduría y Administración]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0186-10422017000401335</article-id>
<article-id pub-id-type="doi">10.1016/j.cya.2017.06.009</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Formation of monopolies in a bipartite market]]></article-title>
<article-title xml:lang="es"><![CDATA[Formación de monopolios en un mercado bipartita]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodriguez Achach]]></surname>
<given-names><![CDATA[Manuel Enrique]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Baquedano Pérez]]></surname>
<given-names><![CDATA[Enrique]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Marista de Mérida  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2017</year>
</pub-date>
<volume>62</volume>
<numero>4</numero>
<fpage>1335</fpage>
<lpage>1344</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0186-10422017000401335&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0186-10422017000401335&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0186-10422017000401335&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract We study the formation of monopolies in a simplified economic model where two brands compete in the market, using an agent based model. Each agent represents a company that uses one of the two available brands and interacts with other companies. The brands continually improve their product in order to compete for market share. In the innovation process companies can decide to change to the other brand if the move is beneficial. There is a cost for the company if it decides to switch to the other brand, and another cost if it stays with its current brand but only upgrades to a new enhanced version of the product. Our simulations show that the system always reaches a state when all companies end using a single brand, which is equivalent to a monopoly. We study the time span needed to reach the single brand final state for different parameters of the model.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Estudiamos la formación de monopolios en un modelo de economía simplificada donde dos marcas compiten por el mercado, usando un modelo basado en agentes. Cada agente representa una compañía que utiliza una de dos marcas disponibles e interactúa con las otras compañías. Las marcas continuamente mejoran su producto para poder competir en el mercado. En el proceso de innovación, las compañías pueden decidir cambiar a la otra marca si esto representa un beneficio. Existe un costo para la compañía asociado con el cambio de marca, y otro costo asociado si se queda con la misma marca pero decide adquirir una nueva versión del producto. Nuestras simulaciones muestran que el sistema siempre llega a un estado donde las compañías terminan utilizando una misma marca, lo que equivale a un mercado monopolístico. Estudiamos el tiempo requerido por el sistema para llegar al estado de monopolio para diferentes parámetros del sistema.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Monopoly]]></kwd>
<kwd lng="en"><![CDATA[Competition]]></kwd>
<kwd lng="en"><![CDATA[Market share]]></kwd>
<kwd lng="en"><![CDATA[Simulation]]></kwd>
<kwd lng="en"><![CDATA[Agent model]]></kwd>
<kwd lng="en"><![CDATA[C63]]></kwd>
<kwd lng="en"><![CDATA[D42]]></kwd>
<kwd lng="es"><![CDATA[Monopolio]]></kwd>
<kwd lng="es"><![CDATA[Competencia]]></kwd>
<kwd lng="es"><![CDATA[Cuota De Mercado]]></kwd>
<kwd lng="es"><![CDATA[Simulación]]></kwd>
<kwd lng="es"><![CDATA[Modelo De Agentes]]></kwd>
<kwd lng="es"><![CDATA[C63]]></kwd>
<kwd lng="es"><![CDATA[D42]]></kwd>
</kwd-group>
</article-meta>
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