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mads.xsd"><authority><topic authority="http://roble.intecca.uned.es/tematres/lem/">Monopolios</topic></authority><related type="narrower"><topic>Monopolios estatales</topic></related><related type="other"><topic>Concentración de empresas</topic></related><related type="other"><topic>Economía</topic></related><related type="other"><topic>Oligopolios</topic></related><related type="other"><topic>Holdings</topic></related><related type="other"><topic>Competencia imperfecta</topic></related><related type="other"><topic>Trusts</topic></related><related type="other"><topic>Sociedades-Fusión</topic></related><related type="other"><topic>Competencia económica</topic></related><related type="broader"><topic>Sociedades anónimas</topic></related></mads>