The Random Utility Model (RUM) is a workhorse model for valuing new products or changes in public goods. But RUMs have been faulted along two lines. First, for including idiosyncratic errors that imply unreasonably high values for new alternatives and unrealistic substitution patterns. Second,...

The standard history of modern environmental economics often views it as an application of A.C. Pigou's theory of externalities, refined over the decades and applied to environmental problems in the 1960s, when the first detailed pro-posals for pricing pollution were outlined by Allen Kneese,...