The demographic breakdown is interesting albeit not too surprising.
Egalitarian or wife as primary or sole breadwinner is more common among college educated wives. Likewise for households with fewer children.
By race, Asian and Black wives are more likely to be in egalitarian households than White or Hispanic, and Black wives are more likely to be wife as the primary or sole breadwinner than other races.
By age, egalitarian households are more common among younger wives, while wife as primary or sole breadwinner is more common among older ages.