Cartel detection is one of the most basic and most complicated tasks of competition authorities. In recent years, however, variance filters have provided a fairly simple tool for rejecting the existence of price-fixing, with the added advantage that the methodology requires only a low volume of...

This paper covers the activities of the Economic Analysis Group (EAG), during 2004–2005. It describes the economic analysis undertaken by EAG in several important investigations, appellate matters, and other activities as an advocate for competition. Copyright Springer 2005