In this Issue: The new EU Guidelines and Block Exemption Regulations on Vertical and Horizontal Restraints: doubts and reflections; Denial of access to a private blockchain as an abuse of dominant position: challenges and solutions; Comparative analysis of the financial sectors in Portugal and Brazil: specific measures and instruments to promote competition; "Killer acquisitions" in EU Merger Control: recent developments brought about by Article 22 of the EUMR, and the CJEU's Towercast judgement.