Seconded. GiveWell needn't be the only source for estimates, but a mission that strongly promoted cost-effective charities could make a huge difference... It's

Seconded. GiveWell needn't be the only source for estimates, but a mission that strongly promoted cost-effective charities could make a huge difference... It's sometimes hard to convince donors of this case. For many (most?) the goal is not really making a difference, but more like a signaling thing. If your company can turn making a difference into a successful social signal, more power to you!