Table 1. Donation and π: Linear regression.

This table presents regression results from the laboratory experiment. SEs in parentheses. Raw data shown in Figs. 6 and 7. *P < 0.10, **P < 0.05, and ***P < 0.01.

	Ordinary least squares
	(1)	(2)	(3)	(4)	(5)	(6)
	d*		Expected income $\mathrm{E}({\mathcal{X}}_2)$		Expected giving (πd*)
Mean dep. var.	0.30		0.39		0.12
% Consequential (π)	−0.176	−0.159*	−0.259*	−0.278***	0.212***	0.219***
	(0.0978)	(0.0855)	(0.108)	(0.0802)	(0.0484)	(0.0452)
κ fixed effects	N	Y	N	Y	N	Y
Observations	71	71	71	71	71	71
R-squared	0.045	0.292	0.077	0.506	0.218	0.339