Credit scores, the economists reason, have a real impact on how financially intertwined two individuals will become.

Couples that have similar credit histories are more likely to take on joint ownership of a mortgage, the researchers discovered. Taking on this burden together could therefore be perceived as a pair of financial handcuffs, or something that raises the transaction cost in the event of a breakup.

On the other hand, a chasm between credit scores suggests that a couple's access to financing, or good terms on those funds, could be impeded and blamed upon one individual. That's a recipe for tension.

The probability of an adverse credit event is also something that increases as the credit score differential between partners widens. According to the report, "a one standard deviation increase of the initial credit score differential is associated with a 19 percent higher chance of filing for bankruptcy during the first two years of the relationship, while the odds are 10 and 15 percent higher for foreclosures and having more of derogatory records, respectively."

The findings on the strength of partnerships with similar credit scores also speaks to the phenomenon known as assortative matching; the notion that in relationships, "opposites attract" does not always apply.

This is true in the animal kingdom, often for practical purposes: individuals within a species and of a similar size find the copulating process easier. For homo sapiens, this can also hold for non-physical attributes, like religious affiliation, level of education, or apparently, credit scores.

In a sense, this revelation also serves to amplify the tragedy of Romeo and Juliet. The star-crossed lovers came from "two households alike in dignity" - and presumably, creditworthiness, making their compatibility self-evident. Default, to adapt a line from another of the Bard's plays, was not in their stars.

But there is also a residual correlation between credit score differentials and conscious uncouplings -- that is, the two tend tend to trend together for factors beyond the aforementioned observable financial channels.

This leads the economists to hypothesize that there is something about credit scores that is indicative of an individual's "underlying trustworthiness," and that such a trait is essential for a healthy relationship.

By introducing a pair of equations to this effect, they manage to strip out any remaining vestige of romance from human relationships: