People, I believe, are far more complex than the "facts" which a study that is already slanted to a specific position ("the influence of working women on the divorce rate" for example) will provide.

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While this is one of many factors that influence teen pregnancy, the study is compelling, given that adolescents spend a significant amount of time watching television, Chandra said.

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If the first six months of a child's life matter as much as most people think they do, then spending even that short time together could influence the result of a twins study.

ECONOMIST: WHAT WE LEARN FROM TWINS

Industry trials can be well conducted, but there are many situations where a lack of independence has had an influence on the way the study was designed and the results that are released.

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While this study may be the first to suggest that a personality trait may influence the risk of a repeat heart attack, many cardiologists have long known mood can affect health.

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You know, maybe the influence of the past 40 years can't be eradicated in even a long intervention study that goes on for about eight years.

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