Table 1.

Regression results

	DV: Donation amount
Donor gender (male)	13.89***
	(.83)
Proportion of visible females	−2.47**
	(.78)
Mean visible donation	.05***
	(0.00)
Same last name	29.27***
	(1.47)
Recipient gender (male)	−1.15
	(.80)
Donor gender (male):Proportion of visible females	3.29**
	(1.15)
Donor gender (male):Mean visible donation	.07***
	(.01)
Donor gender (male):Recipient gender (male)	−1.06
	(.65)
Constant	58.41***
	(1.85)
Observations	218,053

Notes: The DV is donation amount is in US dollars. Donor gender is a binary variable where 0 = female, 1 = male. Proportion of visible females ranges from 0-1 representing the proportion of past donors visible on the page that were female. Mean visible donation is the mean centered average donation amount (in US dollars) displayed on the page at the time of each donation decision. Same last name is a binary variable where 0 = donor and recipient did not have the same last name, and 1 = donor and recipient had the same last name. Recipient gender is a binary variable where 0 = female, 1 = male for the gender of the recipient. *P < 0.05; **P < 0.01; ***P < 0.001. SE in parentheses