Table S1.

Zero-inflated Poisson regression analyses predicting the frequency of low- and high-power positions from demographics (step 1) and dispositional measures (step 2)

Position and variables	Step 1			Step 2
	Coefficient	SE	P	Coefficient	SE	P
Low-power positions
Demographics
Gender	0.125	0.08	0.095	0.120	0.08	0.113
Age	−0.026	0.01	0.005	−0.025	0.01	0.008
Education
Completed high school	0.719	0.20	<0.001	0.801	0.22	<0.001
Some college	−0.225	0.11	0.041	−0.230	0.11	0.041
Completed college	−0.220	0.11	0.043	−0.229	0.11	0.039
Ethnicity
White	−0.046	0.12	0.696	−0.027	0.12	0.816
African American	−0.430	0.20	0.030	−0.377	0.21	0.069
Hispanic	0.814	0.16	<0.001	0.912	0.17	<0.001
Asian	0.301	0.14	0.033	0.311	0.15	0.034
Dispositional measures
Personal sense of power				0.112	0.06	0.064
Social dominance orientation				−0.021	0.07	0.749
Right-wing authoritarianism				−0.010	0.04	0.807
High-power positions
Demographics
Gender	0.057	0.09	0.536	0.073	0.09	0.441
Age	0.030	0.01	0.001	0.019	0.01	0.063
Education
Completed high school	−0.922	0.47	0.047	−0.792	0.49	0.108
Some college	0.150	0.20	0.451	0.090	0.21	0.674
Completed college	0.336	0.18	0.069	0.258	0.20	0.191
Ethnicity
White	−0.088	0.15	0.568	−0.013	0.16	0.936
African American	0.534	0.19	0.004	0.319	0.20	0.119
Hispanic	−1.224	0.42	0.004	−1.181	0.42	0.004
Asian	0.307	0.23	0.188	0.203	0.24	0.389
Dispositional measures
Personal sense of power				0.110	0.08	0.148
Social dominance orientation				0.022	0.08	0.777
Right-wing authoritarianism				0.139	0.06	0.014

Gender was coded -1 = male, 1 = female. Dispositional measures were grand-mean centered.