Final answer:
White Americans are more likely than black Americans to report happier marriages, with marital satisfaction generally declining over time.
Step-by-step explanation:
According to the provided references, it can be inferred that white Americans are more likely than black Americans to report happier marriages. This conclusion is drawn based on patterns of remarriage rates cited in the data. Additionally, women who are homemakers and feel that their relationship is a partnership based on mutual respect tend to report equal happiness in their marriage. On the other hand, marital satisfaction has been found to generally decline over time, especially after the birth of the first child and even more so with multiples, contributing to a higher likelihood of divorce. The information provided does not specifically compare dual-career couples' happiness directly but mentions a study where a hypothesis test was conducted to see if husbands are happier than wives regarding how childcare responsibilities are divided.