Russell 1979 study showed that patients being encouraged to stop smoking by their doctor, along with receiving informative leaflets and advice, were more likely to quit than those who only received a follow up appointment.
Can be government led e.g. smoking ban 2007 in public and workplaces or they can be localised initiatives e.g. discouraging lunchtime drinking for employees. These are useful as they have a large target population and everyone in the company can rally together for support. The smoking ban has significantly reduced smoking at work (but likely has increased at home smoking).
The Stanford Five City Project was a large scale community intervention designed to test whether a…