<?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>0874-5161</journal-id>
<journal-title><![CDATA[Investigação Operacional]]></journal-title>
<abbrev-journal-title><![CDATA[Inv. Op.]]></abbrev-journal-title>
<issn>0874-5161</issn>
<publisher>
<publisher-name><![CDATA[APDIO - Associação Portuguesa de Investigação Operacional]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0874-51612003000200007</article-id>
<title-group>
<article-title xml:lang="pt"><![CDATA[Análise comparativa dos modelos de selecção de carteiras de acções de Markowitz e Konno]]></article-title>
<article-title xml:lang="en"><![CDATA[A comparative analysis of the Markowitz and Konno portfolio selection models]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Júdice]]></surname>
<given-names><![CDATA[Joaquim João]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ribeiro]]></surname>
<given-names><![CDATA[Celma O.]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Santos]]></surname>
<given-names><![CDATA[Jorge P. J.]]></given-names>
</name>
<xref ref-type="aff" rid="A03"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidade de Coimbra Faculdade de Ciências e Tecnologia Departamento de Matemática]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="A02">
<institution><![CDATA[,Universidade de S. Paulo Escola Politécnica Departamento de Engenharia de Produção]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Brasil</country>
</aff>
<aff id="A03">
<institution><![CDATA[,IPV - Instituto Politécnico de Viseu Escola Superior de Tecnologia de Viseu Departamento de Matemática]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2003</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2003</year>
</pub-date>
<volume>23</volume>
<numero>2</numero>
<fpage>211</fpage>
<lpage>224</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_arttext&amp;pid=S0874-51612003000200007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_abstract&amp;pid=S0874-51612003000200007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_pdf&amp;pid=S0874-51612003000200007&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[In this paper Konno portfolio selection model is presented and compared with Markowitz classical model. The computational effort for finding an optimal portfolio by both models is investigated and the quality of the corresponding portfolios is analyzed. The use of these two models in real-life capital markets is finally discussed.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Neste artigo é discutido um modelo desenvolvido por Konno para a selecção de carteiras de activos financeiros e o seu desempenho é comparado com o do modelo clássico de Markowitz. Para além de analisar a velocidade de obtenção de respostas, procura-se avaliar qualitativamente as soluções obtidas e discute-se a efectiva aplicação dos modelos dentro das práticas comuns ao mercado de capitais.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Portfolio Selection Models]]></kwd>
<kwd lng="en"><![CDATA[Risk Analysis]]></kwd>
<kwd lng="en"><![CDATA[Linear Programming]]></kwd>
<kwd lng="en"><![CDATA[Quadratic Programming]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p ALIGN="CENTER"><B>An&#225;lise comparativa dos modelos de selec&#231;&#227;o de carteiras  de ac&#231;&#245;es de Markowitz e Konno</B></p>       <P ALIGN="CENTER">Joaquim Jo&#227;o J&#250;dice §</P>     <P ALIGN="CENTER">Celma O. Ribeiro  †</P>       <P ALIGN="CENTER">Jorge P. J. Santos ‡</P>     <P ALIGN="CENTER">§ Departamento de Matem&#225;tica - Universidade de Coimbra  </P>      <p align="center"><a href="mailto:Joaquim.Judice@co.it.pt">Joaquim.Judice@co.it.pt</a>  </P>     <p align="center"> † Departamento de Engenharia de Produ&#231;&#227;o - Escola    Polit&#233;cnica da Universidade de S. Paulo, Brasil </P>     <p align="center"><a href="mailto:celma@usp.br">celma@usp.br</a> </P>     <p align="center">‡ Departamento de Matem&#225;tica - Escola Superior de Tecnologia    de Viseu - IPV </p>     <p align="center"><a href="mailto:jsantos@mat.estv.ipv.pt">jsantos@mat.estv.ipv.pt</a>  </P>     ]]></body>
<body><![CDATA[<p align="center">&nbsp;</P>     <p align="center">&nbsp; </P>     <P align="center"> <b>Title:</b> A comparative analysis of the Markowitz and Konno    portfolio selection models</P>     <p align="center"><b>Abstract</b></P>       <P align="justify"> In this paper Konno portfolio selection model is presented    and compared with Markowitz classical model. The computational effort for finding    an optimal portfolio by both models is investigated and the quality of the corresponding    portfolios is analyzed. The use of these two models in real-life capital markets    is finally discussed.</P>     <P> <b>Keywords:</b> Portfolio Selection Models, Risk Analysis, Linear Programming,    Quadratic Programming</P>     <P>&nbsp;</P>     <P>&nbsp;</P>        <p align="center"><b>Resumo</b></p>       <P align="justify"> Neste artigo &#233; discutido um modelo desenvolvido por Konno    para a selec&#231;&#227;o de carteiras de activos financeiros e o seu desempenho    &#233; comparado com o do modelo cl&#225;ssico de Markowitz. Para al&#233;m    de analisar a velocidade de obten&#231;&#227;o de respostas, procura-se avaliar    qualitativamente as solu&#231;&#245;es obtidas e discute-se a efectiva aplica&#231;&#227;o    dos modelos dentro das pr&#225;ticas comuns ao mercado de capitais.</P>     ]]></body>
<body><![CDATA[<p align="justify">&nbsp;</p>     <p>&nbsp;</p>     <P>Texto completo disponível apenas em PDF.</P>      <P>Full text only available in PDF format.</P>     <P>&nbsp;</P>       <P>&nbsp;</P>         <!-- ref --><P><b> Refer&#234;ncias</b> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=326780&pid=S0874-5161200300020000700001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><P>  2. E. Dimson, M. 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