I have a different take on why love marriage could have a higer rate (in Nepal where the definition of love is more likely to take a hindi movie turn)...of course some of the stuffs said above is also correct: In love marriage both of you come with high expectation of each other,and you tend to ignore the basic things that make the marriage work in the long run, like compromise and understanding for example. So little things can explode to something big. In the case of arrange marriage, you dive into it with a mental attituted to compromise, because it is a compromise to marry someone who you don't know to begin with.The expectation is lower and so little things that get in the way remains little... But what do I know...I am not married yet ;)