Deadline crush, not getting out the posts I want to. So here instead is one thing I was planning to write about but didn’t really yet.
I’ve written about divorce quite a bit on here, including on the mess of our official statistics. Now Sheela Kennedy and Steven Ruggles have a (paywalled) paper in the January issue of Demography called, “Breaking Up Is Hard to Count: The Rise of Divorce in the United States, 1980–2010.” Because of the paywall and the obscure academic journal, I thought I had some time to write about it, but it’s been reported on Wonkblog and and other places, so no point in waiting.
The headline is, “divorce is actually on the rise.” It’s risen when they age-standardize the trend, but it’s complicated: “Divorce rates have doubled over the past two decades among persons over age 35. Among the youngest couples, however, divorce rates are stable or declining.” The interpretation is not as simple as, “they have a better measure.”
Meanwhile, I was quoted in a Wall Street Journal story about some TV show, and I let slip my multiple-decrement lifetable version of the current divorce rate. This hasn’t been finished, much less peer-reveiwed, but I’m pretty confident about the basic result. I wrote to the reporter, who asked me for the divorce rate:
As for divorce rates, it’s hard to be definitive because there is no one answer. One answer is: In 2012 there were 19 divorces for every 1000 people who were married (my calculation from the 2012 ACS).
However, what most people want to know is what percentage of people who get married will end up getting divorced. There is no official estimate of this because it involves a guess about the future. We can estimate divorce like we estimate life expectancy — it’s not the actual prediction of how long people will live, it’s how long they would live on average if they lived through the risks of most recent year over and over again their whole lives. (Technically, it’s a projection, not a prediction.) Anyway, using that method, I estimate that about 50% of couples who married in 2012 would eventually divorce (with the rest of the marriages ending with someone’s death).
In her story, of course, that became, simply, “And about half of those who married in 2012 will eventually divorce.”
This method, which I got from this old Sam Preston paper, combines mortality rates and death rates to project how many people are lucky enough to die before divorcing at current rates. (Hence “multiple-decrement,” the demographers’ dry way of saying, “there are only two ways out of this.”) When he applied the method, with much cruder data from 1973, incidentally, he got a 43% divorce rate, which was much higher than the rates floating around at the time, and would have made big news in the blogosphere if there had been one.
More on this eventually.