Paul Shea Bates College   655 Goodpasture Is. Rd. Apt. 117 Eugene, OR 97401 USA   pshea@bates.edu   http://uoregon.edu/~pshea   Biographical Sketch: Bates College pshea@bates.edu       JEL Areas: Q4 : Energy: General Q3 : Nonrenewable Resources and Conservation: General