The book says that having children is the best predictor of a woman's going bankrupt, not families.
It also does not say that 1 in 7 families actually go bankrupt, it's only a prediction. "Over the past generation, the signs of middle-class distress have continued to grow, in good times and bad, in recession and in boom. If those trends persist, more than 5 million families with children will file for bankruptcy by the end of this decade. That would mean that nearly one of every seven families with children would have declared itself flat broke, losers in the great economic game." — Preceding unsigned comment added by 2604:2000:1383:8601:9417:B4AB:4A25:C1B2 (talk) 04:12, 7 February 2019 (UTC)Reply