I. Impact and current understanding of gambling disorder -- Gambling and democracy / Peter Adams -- Measuring harm from gambling and estimating its distribution in the population / Matthew Browne -- The social cost of excessive gambling / Claude Jeanrenaud, Mélanie Gay, Dimitri Kohler, Jacques Besson, Olivier Simon -- The normalisation of dangerous gambling : an ethical issue / Jim Orford -- Family members affected by excessive gambling / Jim Orford -- Neurocognitive components of gambling disorder : implications for assessment, treatment and policy / Juan F. Navas, Joël Billieux, Antonio Verdejo-García, José C. Perales -- II. Harm reduction models and initiatives -- Defining harm reduction as part of a public health approach towards gambling / Olivier Simon, Jean-Félix Savary, Gabriel Guarrasi, Cheryl Dickson -- Effective harm minimisation practices : public health implications / Darren R. Christensen -- Harm prevention and reduction efforts in gambling disorder : an international perspective / Charles Livingstone -- The role of treatment in reducing gambling-related harm / David C. Hodgins, Magdalen Schluter -- Public health and gambling : the potential of nudge policies / Magaly Brodeur -- Early detection of at-risk gambling to reduce harm / Suzanne Lischer -- Behavioural tracking in gambling : the use and efficacy of online responsible gambling tools / Mark D. Griffiths -- III. Challenges to evaluation and monitoring -- A logical framework for the evaluation of a harm reduction policy for gambling / Jean-Michel Costes -- Is income derived from problem gambling a good assessment indicator of a responsible gambling strategy? / Jean-Michel Costes -- Challenges of online gambling for risk and harm reduction / Louise Nadeau, Magali Dufour, Richard Guay, Sylvia Kairouz, Jean-Marc Ménard, Catherine Paradis.