Opinion Essay Collection of opinion essays that have appeared in the newsletter of the Anti-Fraud Office of Catalonia. By subscribing to the newsletter, you will be able to obtain information regarding the actions of the Anti-Fraud Office and other issues related to its scope. The Anti-Fraud Office is designated as an independent authority to protect whistleblowers in Catalonia Miguel Ángel Gimeno, director of the Anti-Fraud Office of Catalonia An approach to the management of institutional integrity - Case Ciutat Vella Òscar Roca, Prevention director of the Anti-Fraud Office of Catalonia Why a II Summit against the structural causes of corruption? Miguel Ángel Gimeno, director of the Anti-Fraud Office of Catalonia Ethics and Public Administration Jorge F. Malem, professor of Philosophy of Law Public ethics and transparency Òscar Roca, Prevention director of the Anti-Fraud Office of Catalonia December 9th. International Day Against Corruption Miguel Ángel Gimeno, director of the Anti-Fraud Office of Catalonia Why training in public integrity? Anabel Calvo, officer of the Anti-Fraud Prevention Directorate The paradox of transparency and its limits Jesús García, court journalist in El País Vaccines in the context of a pandemic: reflections from Bioethics Núria Terribas i Sala, director of the Víctor Grifols i Lucas Foundation and of the UVIC-UCC Chair in Bioethics, vice-president of the Bioethics Committee of Catalonia Brief reflections on the transposition of Directive 2019/1937, concerning the protection of persons reporting infringements of Union law Silvina Bacigalupo, Professor of Criminal Law at the Autonomous University of Madrid and President of Transparency International Spain