In UK, the Black Report was produced in 1980 to highlight inequalities. On 11 February 2010, Sir Michael Marmot, an epidemiologist at University College London, published the "Fair Society, Healthy Lives" report on the relationship between health and poverty. Marmot described his findings as illustrating a "social gradient in health": the life expectancy for the poorest is seven years shorter than for the most wealthy, and the poor are more likely to have a disability. In its report on this study, "The Economist" argued that the material causes of this contextual health inequality include unhealthful lifestyles - smoking remains more common, and obesity is increasing fastest, amongst the poor in Britain.