Martina Björkman Nyqvist, Lucia Corno, Damien de Walque, Jakob Svensson, 07 January 2017

Traditional HIV/AIDS education campaigns have not been completely effective in curtailing new infections. One potential reason behind this is that most of the infections occur among individuals who are willing to take risks when it comes to sexual behaviour, and campaigns have failed to specifically target these people. This column describes a new HIV intervention trialled in Lesotho that used a lottery to target such individuals and incentivise safer practices. HIV incidence was reduced by more than a fifth in treatment groups over the trial period. These results, combined with practical and cost advantages, suggest that such interventions could prove invaluable in the fight against HIV.

Matteo Galizzi, Marisa Miraldo, 12 June 2010

Smoking, heavy drinking, and being overweight are known causes of disease. This column presents experimental evidence to try and understand why people ignore this advice. It compares lifestyle choices with people’s attitudes to risk and their patience, finding that while people with an unhealthy lifestyle are no more risk-loving than other people, they are more impatient.

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