The emerging market in air pollution rights
Sulfur dioxide : state versus federal control
95. Congr., 2. sess.
A comparison of alternative models for the demand for medical care
The demand for episodes of medical treatment : interim results from the health insurance experiment
Keeler, Emmett B.,
Developing a probability sample of prostitutes: sample design for the Rand study of HIV infection and risk behaviors in prostitutes
Berry, Sandra H.,