All these studies are bull$shit. They show ONLY a correlation between two things. They can not show causation.
Drawing any conclusion from them is stupid.
My first thought about this 'study' was just that, but it did lead to some interesting comments on the thread.
I think the reason for the higher divorce rates in these stuations is because the men married lazy wives and just got tired of a dirty house.
I'll bet I'm closer to the real story than these 'researchers' are.