From the press release:
Gender-related differences in the American work culture have resulted in lower Social Security benefits for women, the American Academy of Actuaries Social Insurance Committee said in a new issue brief, “Women and Social Security.” The actuaries cite differences in wage histories, greater probabilities of outliving a spouse and being single in retirement, and the greater likelihood for women to be temporarily out of the workforce, among the differences that cause their benefits to be smaller even though calculated using gender-neutral rules.
The Academy’s issue brief also determines that women, who on average are more likely to have insufficient income in retirement, are in turn more dependent on Social Security. In fact more than 40 percent of females aged 62 or older rely on Social Security for more than 90 percent of their income, as opposed to 28 percent for males aged 62 or older. Additionally poverty rates for single women aged 65 or older are among the highest of any subgroup in the United States.