The health effects of psychosocial factors are a controversial topic. Do positive and negative emotions affect our physical health? And can we improve life expectancy by being happier or more positive? Provides methodological rigour, critical analysis and policy implications, this important book is the first to map what we know about psychosocial epidemiology, taking advantage of a huge growth in research, including several 'mega' studies. With chapters on a range of chronic conditions, and authored by leading researchers in the field, it will be invaluable resource for students and...