2. Overview of Legal models and instruments reviewed 2.1 Anti-corruption 2.2. Cybercrime 2.3. Judicial co-operation -joint investigation teams 2.4. Financial area 2.5. Taxation 2.5.1. International co-operation based on bilateral tax models 2.5.2. International co-operation based on multilateral tax treaties 2.6. Patent law 2.7. Summary 3. Matching Legal models and instruments from other enforcement areas to legal obstacles to competition enforcement co-operation 3.1. Consultation, comity, co-ordination and notifications 3.2. Information exchange 3.2.1. Memorandum of Understanding — IOSCO MMoU 3.2.2. Model agreement — OECD Model TIEA 3.2.3. Multilateral Conventions 3.3. Investigative assistance 3.3.1. Multilateral conventions 3.3.2. (Dual) criminality requirements 33.3. Supporting legal models and instruments 3.4. Enhanced enforcement co-operation 3.4.1. Joint investigations 3.42. Lead agency models 3.4.3. Recognition of enforcement outcomes 3.4.4. One-stop-shop models 3.5. Central coordinating bodies 4. Ways forward