subsidies to givers? Is religious giving different? Which fundraising approaches "work", and is more charity always better … Pay More for Charity-Linked Products' -- Ayelet Gneezy, Uri Gneezy, Gerhard Riener and Leif D. Nelson (2012), 'Pay … Private Charity and Public Transfers' -- Theodore Bergstrom, Lawrence Blume and Hal Varian (1986), 'On the Private Provision …