Optimal Leniency Programs When Firms Have Cumulative and Asymmetric Evidence

Working Paper: CEPR ID: DP10106

Authors: Marc Blatter; Winand Emons; Silvio Sticher

Abstract: An antitrust authority deters collusion using fines and a leniency program. Unlike in most of the earlier literature, our firms have imperfect cumulative evidence of the collusion. That is, cartel conviction is not automatic if one firm reports: reporting makes conviction only more likely, the more so, the more firms report. Furthermore, the evidence is distributed asymmetrically among firms. Asymmetry of the evidence can increase the cost of deterrence if the high-evidence firm chooses to remain silent. Minimum-evidence standards may counteract this effect. Under a marker system only one firm reports; this may increase the cost of deterrence.

Keywords: Antitrust; Cartels; Deterrence; Evidence; Leniency

JEL Codes: D43; K21; K42; L40


Causal Claims Network Graph

Edges that are evidenced by causal inference methods are in orange, and the rest are in light blue.


Causal Claims

CauseEffect
Antitrust Authority (AA) (L40)deterrence of collusion (L12)
asymmetry of evidence (D80)deterrence costs (K40)
high-evidence firm silent & low-evidence firm reports (G33)deterrence costs (K40)
minimum evidence standards (K40)AA's enforcement costs (H26)
high-evidence firm qualifies for leniency (K21)likelihood of conviction (K14)
marker system (Y91)AA's ability to deter collusion (K21)
evidence availability (K41)AA's ability to deter collusion (K21)

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