This deliverable, entitled D8.3 Research Ethics Handbook, contains ethical principles and guidelines that STRATEGY partners will follow during the research activities of the project. The Handbook sets forth an approach to research in STRATEGY that treats research participants fairly, to protect their rights and interests and preserve their dignity. It provides standards and guidelines to ensure that the processing of personal data is undertaken in an ethical and privacy sensitive manner. This handling of personal data is compliant with the General Data Protection Regulation (GDPR), H2020 guidelines and European legislation including the Charter of Fundamental Rights of the EU. Additionally, it should be noted that Deliverable 9.1 POPD – Requirement No.2 of the project focuses also on the protection of personal data within STRATEGY and describes how the project complies with the right to data protection of research participants, including, for example, reference to the relevant technical and organisational measures adopted by the consortium. The principles contained within this Ηandbook ensure also that research conducted as part of STRATEGY meets relevant codes of practice, such as the European Code of Conduct for Research Integrity and the Ethical Practice Statement of the British Sociological Association.