Contents: Introduction, Francesco Lo Piccolo and Huw Thomas; Part I Ethical Frameworks: Consequentialism and the ethics of planning research, Nigel Taylor; Virtue ethics and research ethics, Huw Thomas; Pragmatic ethics and sustainable development, Niraj Verma. Part II Institutional Contexts and Constraints: Planning research, ethical conduct and radical politics, Kanishka Goonewardena; The knowledge business in academic planning research, Rob Imrie; Ethical issues in PhD research training, Daniela Mello; The responsibility to ask questions: the case of bias in travel demand forecasting, P. Anthony Brinkman; Environmental planning research: ethical perspectives in institutional and value-driven approaches, Filippo Schilleci; Ethics and consultancy, Adrian Healy; Research planning practice, Patsy Healey. Part III Ethics in the Practice of Planning Research: Toward a naturalistic research ethic: or how mediators must act well to learn, if they are to practice effectively, John Forester and David Laws; Knowledge, power and ethics in extraordinary times: learning from the Naples waste crisis, Laura Lieto; Ethical awareness in advocacy planning research, Giovanni Attili; On having imperial eyes, Libby Porter; Multiple roles in multiple dramas: ethical challenges in undertaking participatory planning research, Francesco Lo Piccolo; Conclusions, Francesco La Piccolo and Huw Thomas; Index.