Resumen: El artículo busca medir el impacto de la Fiscalía Nacional Económica en los juicios de libre competencia en Chile. Usando la estadística de litigios, a partir del momento en que el Tribunal fue creado, se obtiene que la participación de la agencia pública aumenta en 44 puntos porcentuales la probabilidad de lograr un veredicto culpable en una demanda www.cepchile.cl Palabras clave: libre competencia, persecución pública, litigación. Abstract: The article seeks to measure the impact of

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... he National Economic Prosecution Agency on antitrust trails in Chile. Using trial statistics, considering the timeline from the moment the tribunal was created, the involvement of the economic prosecutor shows an increase of 44 percent on the probability of conviction on an antitrust lawsuit. On the condition that the trial will end up with a ruling, statistics show an increase of 38 percent on the probability of conviction when the economic prosecutor gets involved. The results are robust in showing possible "selection-bias" on the part of the prosecution, something that is so when the Supreme Court gets involved and rules. The article also shows a tendency on the part of the prosecution to get involved in cases of sensitive markets and allegations of collusion. The fact that the indicted is a state institution or its size do not affect the probability of the Prosecution getting involved.