Social networks and health inequalities: A new perspective for research

'Tell me how much your friends earn and I'll tell you whether you smoke, what diseases you have and how old you're going to become! Part of this statement should be familiar to those who are interested in the connection between social inequality and health. People of comparatively lower socioeconomic status are at higher risk of health problems and are more likely to fall ill and die earlier than those who have a higher income' etc. However, the sentence does not ask about your own income, but about the income of your friends.