The longer parents live, the longer their children postpone retirement, the Center for Retirement Research at Boston College reports in a new study.

A worker’s life expectancy impacts both retirement planning and actual retirement, the study concludes.

The amount of time a man age 65 can be expected to live has grown four years since 1980 to 18.7 years.

Not only does the increased life expectancy (and need for more money to pay for it) delay retirement, but the belief the latter years will be accompanied by good health, the researchers said.