Introduction: reflecting on the maturing South African competition law regime / Kasturi Moodaliyar, Simon Roberts -- pt. 1. Competition law, economics and policy. Public-interest provisions in the South African Competition Act: a critical review / James Hodge, Sha'ista Goga, Tshepiso Moahloli ; A framework for promoting competition in electronic communications: clarifying the role of the competition authorities and the sector regulator / Kasturi Moodaliyar, Keith Weeks -- pt. 2. Mergers. Self-supply and indirect constraints within competition analysis / Robert Lipschitz, Fatima Fiandeiro, Paul Anderson ; Geographic market definition in retail mergers where a national pricing policy is applied / Andrew Myburgh, Shannon Knight, Fathima Sheik ; Vertical arithmetic and its application in vertical mergers / James Hodge, Sha'ista Goga, Jason Aproskie ; Do vertical mergers facilitate upstream collusion? / Liberty Mncube, Lindiwe Khumalo, Mfundo Ngobese -- pt. 3. Abuse of dominance. The South African Airways cases: blazing a trail for Europe to follow? / Helen Jenkins, Gunnar Niels, Robin Noble ; Policy approaches to margin squeeze in the telecommunications sector in the US and EU, as applied in South Africa / Ryan Hawthorne, Kate Morris ;Price discrimination in input markets: analysing competitive effects following the Nationwide Poles case / Uğur Akgün, Serge Moresi, Robert Stillman -- pt. 4. Cartels. South Africa's corporate leniency policy / Chantal Lavoie ; The wrong side of the tracks: what are the empirical differences between collusion, parallelism and competition / Patrick D. Smith ; The role of information exchange in facilitating collusion: insights from selected cases / Reena das Nair, Liberty Mncube.