Summary of “How happiness in marriage changes over time”

To answer that question, sociologists Paul Amato from Pennsylvania State University and Spencer James of Brigham Young University examined data from 1,617 participants in the Marital Instability over the Life Course survey, a longitudinal study of marriage.
Much like other researchers, the team found that happiness declines in the first years of marriage, as the flush of newlywed life gives way to day-to-day frustrations and realities.
In couples headed for divorce, reported happiness declined continuously and precipitously until the marriage’s end.
Another interesting finding is how differently men and women view the same marriage, both in enduring and shorter-lived pairings.
Women in long-term marriages reported less happiness and more conflict at the start of the marriage, though eventually their views of marital conflict converged with their spouse’s.
Happiness is subjective, but how can couples have competing accounts of how much time they spend together, or how many arguments they have? As it turns out, one of the few constant findings in marriage research is that spouses tend to view the same relationship quite differently.
How the chores are shared, how often they have sex, and even how much money they earn.
The data paints a picture of lasting marriage as a long process of letting go of conflict and learning how to be together.

The orginal article.