In 1960 he resigned from the Institute for Sex Research to pursue his doctoral degree, receiving his Ph.D. (in social relations) from Johns Hopkins University in 1966. From 1966 until 1989, he conducted research, specializing in gerontology and sociology at the Francis Scott Key Medical Center in Baltimore, Maryland. He retired in 1989, and died on 5 December 2014, aged 96.
In 1960 he stepped down from the Institute for Sex Research to focus on his doctoral studies, earning his Ph.D. (in social relations) from Johns Hopkins University in 1966. He spent the next 23 years conducting research, concentrating on gerontology and sociology at the Francis Scott Key Medical Center in Baltimore, Maryland. He retired in 1989 and passed away on December 5, 2014, at the age of 96.