Charities seeking donations usually employ an "appeals scale," a set of specific suggested amounts presented directly to potential donors. Choosing them well is crucial: if charities select overly high scale points, they risk their being ignored or even alienating donors and receiving nothing,...

Charities seeking donations typically employ an “appeals scale,” a roster of suggested amounts presented to potential donors, along with an “Other” category. Yet little is known about how the amounts comprising appeals scales affect whether a donation is made and, if so, jointly exert...