Control group
Two-dollar group
Five-dollar group
Full sample Respondents only Full sample Respondents only Full sample Respondents only
Mean age 21.04 21.10 21.16 20.79 20.90 21.06
Mean class year 1.54 1.49 1.60 1.56 1.55 1.62
Mean GPA 2.96 3.12** 3.09 3.20 3.06 3.20
Percent Female 48.91 58.24* 47.20 58.44* 50.00 49.21
Percent Racial minority 23.95 20.81 17.65 20.00 25.17 23.33
Percent State resident 91.49 91.76 88.80 88.31 90.00 90.48
Percent International 4.01 4.40 4.40 2.60 4.67 4.76
Percent On-campus 32.05 41.21* 26.80 29.87 30.67 33.33
Sample size n=600 n=182 n=250 n=77 n=150 n=63