Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
In a complete information setting we show that the standard lottery–in which each lottery ticket is offered for the same price–is an optimal fundraising mechanism in the presence of strong asymmetries in the way bettors value the prize and the public good provided with the lottery proceeds. When participants are more homogeneous, it is optimal to offer discounts for the purchase of multiple tickets.