The researchers discovered what many people have perhaps long suspected when they hired 44 undergraduates to go door-to-door fundraising for their university in East Carolina.
The students' attractiveness was rated by 150 strangers before they went out to knock on doors and plead their case.
Women whose beauty was ranked highest in this way received more than double the hourly amount of any other fundraisers. Beautiful blonde women were particularly successful, raising $1.52 (80p) more per household than their beautiful brunette counterparts.
However, women who answered the door were found to be less susceptible to the charm of the blondes, according to the article, which appears in the May edition of the Quarterly Journal of Economics, edited by Harvard University's Department of Economics.
The results, researchers concluded, "are entirely driven by households where a male answers the door".