Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
This paper examines the impact of payment choice on charitable giving with a door-to-door fund-raising field experiment. Respondents can donate cash only, use debit only, or have both options. Cash donations have lower visibility vis-à-vis solicitors than debit card donations. When debit replaces cash, participation drops by 87 percent. Conditional on participation, donors in the Debit-only treatment give more than donors in Cash-only. In Cash&Debit, almost all donors prefer cash; participation decreases compared to Cash-only. Physical attractiveness of both female and male solicitors increases contributions. Solicitor self-confidence has a negative impact. (JEL D14, D64, L31)