There was an intersting article in the New York Times a few weeks ago called I Say Spend. You Say No. We’re in Love. by Catherine Rampell. Here is the intro:
"Despite the old saying “opposites attract,” scholars have found that in almost every way imaginable, people tend to choose mates who look, sound and act as they do. But in the area perhaps most fraught with potential conflict — money — somehow, some way, people gravitate toward their polar opposite, a new study says. “Spendthrifts” and “tightwads” (which, as it turns out, are actual academic terms) tend to marry the other. Unfortunately, these dichotomized duos report unhappier marriages than people with more similar attitudes toward spending."
The rest of the article explains the research that has been done on this by marketing and psychology professors.