Sorry to arouse a zombie, but I actually had a very recent conversation with someone about this, and my conversation partner happened to know a lot about statistics-- not these in particular, but had looked at these variables once for a problem for a class he was teaching.
This fluctuates a lot by social strata.
In the lower socio-economic classes, when there are young children, women, who know they are probably going to en up with the children most of the time, and will constantly be in court trying to get child support from their exes, may decided that remaining in the marriage is better than going it alone. However, if they have a chance to remarry right away, to someone who says he doesn’t mind helping support her kids-- or maybe even has kids of his own, and will be contributing to supporting hers, while she is often the one meeting his kids’ bus-- that doesn’t seem so bad. IOW, same situation, better man (from her perspective).
In the lower classes, the man might not be so anxious to be financially responsible for two households, which is his worst case scenario if he leave his wife for another woman, and if he leaves to be on his own, he loses his maid, cook, nanny, etc. If he lives in a house with his wife and kids, he knows that the wife and kids will probably stay in the house, because she will get custody. He will have to move, and pay for the move-- she’s not going to split the cost. He needs first and last month’s rent some place, van rental, deposit for cable, and maybe utilities.
In the middle classes, there are many of the same issues, just scaled up. Additionally, if the man, because he can afford a lawyer, sues for custody and wins, he now has to worry about the children, and she may have been the one making all the appointments, going to all the school conferences, etc., before. He has to learn all this from the ground up. He may also have to learn to cook, and how to make healthy meals kids will eat, not just a couple of times a month, but every day, day after day.
If he doesn’t sue for custody, he may get hit with a whopping child support bill, because often the burden is that “the child’s standard of living does not change.” It may not be common, but it is even within a judge’s power to order him to find an apartment where each child has their own room, if this is what they have always had. Again, not common-- but it does happen that father’s get told a 2 bedroom apartment for 4 children won’t work, even if the father plans to sleep on the couch and give up his room to two of the children when they visit.
In both the lower and middle classes, divorce tends to work out a little better for women-- but that’s because marriage tends to workout a little better for men, if that makes sense. So, men don’t want to divorce unless they can recreate the situation which favors them. The lowest classes may divorce less often, though, just because divorce itself, and splitting up, are both expensive. Once you start getting into the upper classes, you start seeing people hiring clever-- and expensive-- lawyers.
Rich people usually don’t leave one another for things other than another partner, and that goes for the men and the women. This is because rich people in bad marriages have other ways of dealing with their bad marriages besides suffering, or divorcing.
Rich people can afford big houses with separate bedrooms, and separate studies, even separate bathrooms. Or, they can afford an apartment, so they have a house in the suburbs, and an apartment in the city, and live in them at different times. They can take separate vacations. One can be home with the children while the other is at the yearly Yoga Spirit-fest in Prague, and then that one will return and stay with the kids while the other goes on a tour of anthropological digs in west Africa. One has season tickets to a sports even on Sunday afternoons, and the other has season tickets to a theaters performances on Saturday nights.
They may even do different things with the children: one takes them to a theme park in the spring, and the other for a weekend camping trip in the summer.
They can manage discreet affairs, and if their partners are also married to other people, divorce may never even come up. They have the resources to meet and be alone.
So, the answer to this will depend very much on the circumstances of the person you are asking.