Martin Knapp is Professor of Social Policy and Chair of Health and Social Care at the London School of Economics. He is also Professor of Health Economics and Director of the Centre for the Economics of Mental Health at the Institute of Psychiatry, King's College, London.

Martin has been working for many years in the fields of long-term care, social care and mental health policy and practice. Current activities include economic evaluations of a wide range of treatments and other interventions for people with mental health problems; studies of the developing 'mixed economy' of social care; and long-term care expenditure projections.

Among his many publications, he was co-author of the British Medical Journal article Financial cost of social exclusion: follow-up study of antisocial children into adulthood.