A report by the Urban Institute reveals a decline in donor retention rates from 49.6% to 41.5% between 2004-2011, highlighting the cost-effectiveness of soliciting repeat donations over new ones. Key findings from a survey of 4,018 donors indicate that they prefer personalized updates, acknowledgment via letters, and typically do not respond positively to payback gifts. Additionally, most donors prefer to be asked for donations no more than four times a year and suggest waiting at least seven months before soliciting a second contribution.