This paper presents an experimental investigation of the three ambient-based mechanisms proposed by Segerson [J. Environ. Econom. Management 15, 87-98 (1988)] for controlling emissions from a group of nonpoint source polluters: a marginal tax/subsidy, a fixed penalty, and a mechanism that...

In this paper we build on a voluntary mechanism introduced by Segerson and Wu (2006) that uses the threat of an ambient tax to induce nonpoint source polluters to reduce emissions. In addition to reviewing Segerson and Wu's policy, we propose a new voluntary/threat policy that offers some...