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Placebo-controlled trials, in which neither the researchers nor the participants know who receives the placebo or the actual drug, are considered the gold standard for establishing what drives behavior, according to Metrik, who is affiliated with Browns School of Public Health and Warren Alpert Medical School

A study of 52,000 construction workers found that 11 percent of smokers among them were unemployed, compared to 6.4 percent of nonsmokers

We introduce a framework that links biological traits to long-term environmental responses, providing a predictive basis for traitsensitivity relationships

The cover features an illustration by Dr

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