They investigated two independent variables: (1) the presence or absence of an unsuccessful social confrontation with the transgressor regarding the fraud and (2) the type of fraudulent act that occurred.

FORBES: Don't Ask/Don't Tell About Corporate Fraud: The Effect of Confrontation On Intentions to Report Fraud by Kelly Richmond Pope, Ph.D., CPA, Peter Milan and Anya Hostetler

To examine this phenomenon further, I ran multiple regression analyses with the party score as the dependent variable and various institutional data points (controlling for tuition, proportion of students receiving Pell grants, overall enrollment, average SAT scores and whether schools were public or private) as the independent variables.

FORBES: Play Hard, Work Little: Life on America's College Campuses