The downside of living together before you get married

It seems so obvious: you love someone, marriage is a possibility, you are not 100% sure or 100% ready, so you move in together to test the water and test each other. It will help you, surely, to get to know each other better, to deepen your mutual love, to see whether you are truly compatible, and to lay the foundations for a happy and lasting marriage. It seems so obvious, but it isn’t true.

This is without not speaking about ‘sexual morality’ here (although you can’t separate the moral aspect from everything else); or about a ‘Christian’ or ‘religious’ view of marriage. It is simply the psychological and statistical data that show how living together before you get married makes it harder for you to choose the right person and harder to prepare for a lifelong marriage together.

Meg Jay, a clinical psychologist at the University of Virginia, presents some recent findings in psychology and sociology:

Cohabitation in the United States has increased by more than 1,500 percent in the past half century. In 1960, about 450,000 unmarried couples lived together. Now the number is more than 7.5 million. The majority of young adults in their 20s will live with a romantic partner at least once, and more than half of all marriages will be preceded by cohabitation. This shift has been attributed to the sexual revolution and the availability of birth control, and in our current economy, sharing the bills makes cohabiting appealing. But when you talk to people in their 20s, you also hear about something else: cohabitation as prophylaxis.

In a nationwide survey conducted in 2001 by the National Marriage Project, then at Rutgers and now at the University of Virginia, nearly half of 20-somethings agreed with the statement, “You would only marry someone if he or she agreed to live together with you first, so that you could find out whether you really get along.” About two-thirds said they believed that moving in together before marriage was a good way to avoid divorce.

But that belief is contradicted by experience. Couples who cohabit before marriage (and especially before an engagement or an otherwise clear commitment) tend to be less satisfied with their marriages — and more likely to divorce — than couples who do not. These negative outcomes are called the cohabitation effect.

Researchers originally attributed the cohabitation effect to selection, or the idea that cohabitors were less conventional about marriage and thus more open to divorce. As cohabitation has become a norm, however, studies have shown that the effect is not entirely explained by individual characteristics like religion, education or politics. Research suggests that at least some of the risks may lie in cohabitation itself.

But why is this? It’s due to a factor called ‘sliding, not deciding’.

Moving from dating to sleeping over to sleeping over a lot to cohabitation can be a gradual slope, one not marked by rings or ceremonies or sometimes even a conversation. Couples bypass talking about why they want to live together and what it will mean.

WHEN researchers ask cohabitors these questions, partners often have different, unspoken — even unconscious — agendas. Women are more likely to view cohabitation as a step toward marriage, while men are more likely to see it as a way to test a relationship or postpone commitment, and this gender asymmetry is associated with negative interactions and lower levels of commitment even after the relationship progresses to marriage. One thing men and women do agree on, however, is that their standards for a live-in partner are lower than they are for a spouse.

Sliding into cohabitation wouldn’t be a problem if sliding out were as easy. But it isn’t. Too often, young adults enter into what they imagine will be low-cost, low-risk living situations only to find themselves unable to get out months, even years, later. It’s like signing up for a credit card with 0 percent interest. At the end of 12 months when the interest goes up to 23 percent you feel stuck because your balance is too high to pay off. In fact, cohabitation can be exactly like that. In behavioral economics, it’s called consumer lock-in.

Lock-in is the decreased likelihood to search for, or change to, another option once an investment in something has been made. The greater the setup costs, the less likely we are to move to another, even better, situation, especially when faced with switching costs, or the time, money and effort it requires to make a change.

Jay writes about her own experience of working as a clinical psychologist.

I’ve had other clients who also wish they hadn’t sunk years of their 20s into relationships that would have lasted only months had they not been living together. Others want to feel committed to their partners, yet they are confused about whether they have consciously chosen their mates. Founding relationships on convenience or ambiguity can interfere with the process of claiming the people we love. A life built on top of “maybe you’ll do” simply may not feel as dedicated as a life built on top of the “we do” of commitment or marriage.

And this is her non-moralising but very practical conclusion:

I am not for or against living together, but I am for young adults knowing that, far from safeguarding against divorce and unhappiness, moving in with someone can increase your chances of making a mistake — or of spending too much time on a mistake. A mentor of mine used to say, “The best time to work on someone’s marriage is before he or she has one,” and in our era, that may mean before cohabitation.