We report results from an economic experiment where two markets institutions for controlling water pollution are compared. In the status quo institution, permit trades between point and nonpoint sources are subject to a trading ratio. In the alternative, nonpoint abatements are converted into...

We compare two tradable permit markets in their ability to meet a safety first environmental target at least cost when some polluters have stochastic, correlated, and non-measurable emissions. In both markets, the point source permit defines the allowable level of the observed (deterministic)...