We present a theory of vehicle choice where utility depends on the vehicle choices made by other consumers. We use parameters from current transportation and public safety data to show that changes in motor vehicle policy may have unexpectedly large or non-existent effects on safety, fleet mix,...

The dominant paradigm of conservation-reserve planning in economics is to optimize the provision of physical conservation benefits (measured in units like species protected) given a budget constraint. Large-scale biology-based priority setting implies that the value we place on biodiversity and...

Research related to the Endangered Species Act tends to take the presence of that policy as given and focus on issues of implementation and effects. This paper seeks to reconsider U.S. conservation policy entirely. The ESA does not protect species or ecosystems that are not endangered, and...

Paper removed at the request of the authors.