Variables	Coding
Dependent Variable
Intentions for graduate school	0=STEM graduate/professional program, 1=non-STEM    graduate/professional program, 2=no    graduate/professional school intentions
Student-Level Variables
Race: Native American	1=yes, 0=no
Race: Latino	1=yes, 0=no
Race: Black	1=yes, 0=no
Race: Asian American	1=yes, 0=no
Sex: Female	1=yes, 0=no
Composite SAT score	Continuous, range from 4 to 16; includes ACT score    conversion
High School GPA	1=D to 8=A or A+
HS years of studying math	1=None to 7=Five or more
Income	1=Less than $10,000 to 14=$250,000 or more
Mother’s education	1=grammar school or less to 8=graduate degree
2004 degree aspiration: Ph.D. (J.D., master’s degree, and     bachelor’s degree comprise the reference group)	1=yes, 0=no
2004 degree aspiration: M.D. (J.D., master’s degree, and     bachelor’s degree comprise the reference group)	1=yes, 0=no
Came to college to prepare for graduate/professional school	1=Not important to 3=Very important
2004 major: Life sciences (nursing is the reference group)	1=yes, 0=no
2004 major: Physical sciences	1=yes, 0=no
2004 major: Health sciences	1=yes, 0=no
2004 major: Engineering or computer science	1=yes, 0=no
Participated in an undergraduate research program	1=yes, 0=no
Joined a pre-professional or departmental club	1=yes, 0=no
Interacted with graduate students/TAs	1=Not at all to 3=Frequently
Career Focus: Working for social change	1=Not important to 4=Essential
Creer Focus: Discovery/enhancement of knowledge	l=Not important to 4=Essential
Hours per week spent studying/doing homework	l=none through 8=20 or more
Faculty mentorship construct	Construct consisting of seven items of students’ reports of the    frequency that faculty provided: encouragement to    pursue graduate study; an opportunity to work on a    research project; advice and guidance about    educational program; emotional support and guidance;    a letter of recommendation; feedback about academic    work; help in achieving professional goals
Academic major GPA	1=D through 8=A or A+
STEM major in 2008	l=yes, 0=no
Total loans taken out for undergraduate education	Continuous
Financial aid: Own resources	1=None to 6=$10,000 or more
Financial aid: Aid which need not be repaid	1=None to 6=$10,000 or more
Financial aid: Aid which must be repaid	1=None to 6=$10,000 or more
Institutional Characteristics
Control: Private	l=yes, 0=no
HBCU	l=yes, 0=no
Selectivity	Continuous, range of 4 to 16
Proportion of non-White students	Continuous
Proportion of STEM undergraduates	Continuous
Undergraduate full-time equivalent (log)	Continuous