Walk the Talk? The Effect of Voting and Excludability in Public Goods Experiments

Table 5

The effect of personal traits and major on individual contributions in Experiment 2(mixed effects models, maximum likelihood estimation).

Variable	Model 7	Model 8	Model 9
Dependent variable	Individual contribution
CONSTANT	6.620^∗∗∗	5.507^∗∗∗	2.507^∗∗∗
EXCLUDABLE PG (YES = 1)	−0.005	−0.005	−0.005
PLAYING XPG FIRST (YES = 1)	0.439
ROUNDS 1–10 (YES = 1)		0.702^∗∗∗	0.703^∗∗∗
ROUND	−0.083^∗∗∗
FEMALE (YES = 1)		0.340^∗∗	0.458^∗∗∗
ECONOMICS(YES = 1)		−0.680^∗∗∗
SOCIAL SCIENCES (YES = 1)		0.605^∗∗∗
EMPATHY			0.292^∗∗∗
INTERNAL LOCUS OF CONTROL			0.256^∗∗
TRUST			0.070
Akaike Info Criterion	12015	11970	12017
Number of obs.	2400 (random effect for 24 groups)

∗∗∗significant at 1% level; ∗∗at 5%; ∗at 10%.