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Un indice de dominación para el análisis de la estructura de los mercados

  • García Alba Iduñate, Pascual

    (El Colegio de México y miembro de la Comisión Federal de Competencia de México.)

Registered author(s):

    Herfindahl`s concentration index (H) is used by most antitrust authorities. The Theory has established that this index is appropriate in cases of firms of similar sizes, However, in the other circumstances such index gives results opposite to those suggested by industrial organization theory. For example, H always increase with mergers, in spite of the fact that theory has concluded that some mergers, under some circumstance, can be procompetitive. In this essay a dominance index (P) is proposed. Such index coincides with H when firms are of the same size, but it decreases in the face of some mergers, when some conditions arefulfiled. This conditions are closed to those suggested by some theorists and by some antitrust practitioners.// El índice de concentración de Herfindahl (H) es utilizado para analizar las estructuras de mercado, por prácticamente todas las autoridades en materia de competencia en el mundo. La teoría ha establecido que este índice es adecuado en el caso de que no existan grandes diferencias de tamaño entre las empresas que participan en el mercado correspondiente. Sin embargo, en otras circunstancias dicho índice da en ocasiones resultados distintos de los que propone la teoría de la organización industrial. En esepcial, H siempre aumenta con las funciones entre empresas, a pesar de que la teoría establece circunstancias en las que algunas fusiones pueden ser procompetitivas. En este ensayo se propone un ínidce de dominación (P), que coincide con el ínidice H cuando las empresas son de igual tamaño, pero que en otras condiciones puede decrecer con algunas fusiones. estas condiciones están relacionadas con las que sugieren algunos teóricos y practicantes de la política antimonopólica.

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    Article provided by Fondo de Cultura Económica in its journal El Trimestre Económico.

    Volume (Year): LXI(3) (1994)
    Issue (Month): 243 (julio-septiembre)
    Pages: 499-524

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    Handle: RePEc:elt:journl:v:61:y:1994:i:243:p:499-524
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