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. https://nonprofit.report/Resources/Whitepapers/59015f24-d0de-4034-ade2-040480ccc8a1_Suggested_Donation_Amounts_03142018.pdf
whitepaper
A NONPROFIT'S GUIDE TO SUGGESTED DONATION AMOUNTS
Research tells us that offering donors a choice of giving levels will increase the overall average donation size. Your own experience confirms that donors will give more when they’re prompted with specific amounts. Some nonprofits manually test their forms, changing donation amounts every few weeks or months and recording those results. DOWNLOAD