Guidance to national courts: Quantification of harm caused by infringements of the EU antitrust rules

EC, here. 

QUANTIFICATION OF HARM TO COMPETITION BY NATIONAL COURTS AND COMPETITION AGENCIES

OECD Roundtable, here.

EU Draft Guidance Paper − Quantifying harm in actions for damages based on breaches of Article 101 or 102 of the Treaty

Here. 

Quantification of Harm in Private Antitrust Actions in the United States

H.Hovenkamp, here.