While death rates can be volatile from year to year, Choi and Schoeni’s study is part of a raft of other research showing the health of Americans deteriorating.

Researchers have offered many theories for why Americans’ health is getting worse. Princeton University economists Anne Case and Angus Deaton, a Nobel Prize winner, have argued that an epidemic of suicide, drug overdoses and alcohol abuse have caused a spike in death rates among middle-age whites.

Higher rates of obesity may also be taking their toll. And Americans may have already seen most of the benefits from previous positive developments that cut the death rate, such as a decline in smoking and medical advances like statins that fight cardiovascular disease.

Declining health and life expectancy are good news for one constituency: Pension plans, which must send a monthly check to retirees for as long as they live.

According to the latest figures from the Society of Actuaries, life expectancy for pension participants has dropped since its last calculation by 0.2 years. A 65-year-old man can expect to live to 85.6 years, and a woman can expect to make it to 87.6. As a result, the group calculates a typical pension plan’s obligations could fall by 0.7 percent to 1 percent.

This article was provided by Bloomberg News.

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