I'd like to see whether there's a correlation here between gender imbalance in the particular subject and the marriage rate. I suspect theology is a heavily male-dominated subject, since a large number of the associated careers are either formally male-only or traditionally male-dominated.
I'm wondering if this might be a case where the men outnumber women so much that a high proportion of the women in the field can easily find suitable men to pair off with without going further than their college.
Checking whether other male-dominated subjects have similarly high intra-major marriage rates would test this(I don't know what they are, offhand, but I suspect a lot of STEM subjects might be there), and also doing the gender-reversed study (where it goes by the first marriage of the husband) might get similar results with more female-heavy subjects.
I'm wondering if this might be a case where the men outnumber women so much that a high proportion of the women in the field can easily find suitable men to pair off with without going further than their college.
Checking whether other male-dominated subjects have similarly high intra-major marriage rates would test this(I don't know what they are, offhand, but I suspect a lot of STEM subjects might be there), and also doing the gender-reversed study (where it goes by the first marriage of the husband) might get similar results with more female-heavy subjects.