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Years played measured concussion exposure
Years played as exposure
Personal injury cases don't easily settle as a class, because each one raises individual issues. Supreme Court cases like Amchem and Ortiz say so. The way through is to make the allocation process simple, since a complicated one highlights those individual issues. The NFL settlement paid by years of play, a proxy for exposure, and by age.
Why age matters
Age carries the logic. Someone under 65 with dementia very likely got it from concussions. After 65, the background rate for dementia goes through the roof, so the same diagnosis points less clearly to football. Epidemiologists, other experts, and neurologists worked out the assumptions.
An uncapped settlement
The NFL also took on risk that many defendants refuse. The settlement was uncapped, so the league pays claims as they come in. It has paid out over a billion and a half dollars to players and families who weren't getting help from the NFL's disability programs.
Why did courts doubt personal injury class settlements?
In Amchem Products v. Windsor in 1997, the Supreme Court rejected a nationwide asbestos class settlement. It found that people who were already sick and people who were only exposed had conflicting interests, and that individual questions outweighed the common ones. Two years later, Ortiz v. Fibreboard raised similar concerns about another asbestos settlement built around a limited fund. Those rulings pushed later personal injury settlements toward simple, objective ways of dividing the money.
Why does dementia risk climb after 65?
Age is the strongest known risk factor for dementia. Over decades the brain accumulates changes such as protein deposits and damaged blood vessels from many different causes. Those causes overlap in older adults, which makes it hard to trace a diagnosis to one earlier event. The Alzheimer's Association reports that the likelihood of developing Alzheimer's disease roughly doubles every five years after age 65.
How did researchers link football to brain disease?
In 2017, a study in the Journal of the American Medical Association by Boston University researchers examined the donated brains of 202 deceased football players. It found chronic traumatic encephalopathy in 177 of them, including 110 of 111 former NFL players. The authors noted that the sample was skewed, because brain donations often come from families who suspected a problem.
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