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Abstract
El sistema de salud colombiano presenta evidencia del poder de mercado de las entidades
promotoras de salud (EPS) con respecto a las instituciones prestadoras de salud (IPS) hospitalarias.
El trabajo pone esta hipótesis sobre un piso de la evidencia empírica y muestra que
la concentración de las EPS hoy en día es más alta que la de las IPS. Los hospitales tratan de
defenderse, construyendo “islas” de concentración en unas especialidades selectas. Sin embargo,
las especialidades más concentradas no llegan al nivel de la concentración de las aseguradoras.
El desequilibrio en el grado de la concentración explica el poder de mercado ejercido por las
EPS respecto a las IPS. El poder de mercado funciona como una de las causas que explican la
difícil situación financiera de las IPS. Se sugieren medidas para corregir dicha situación.
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