times on the project. Sarah Browne assisted in an important way throughout, and helped in particular with the survey of households' utilities.

We are indebted to the Energy Policy Project staff for intellectual stimulation and technical contributions. We sought technical information from many who were generous with their time and helpful advice. Among them we owe particular thanks to staff at the National Bureau of Standards, especially Tamami Kasuda, and to David DiJulio, manager of the Air Quality Planning Programs of the Metropolitan Washington Council of Governments.

We are particularly grateful to the President of the Washington Center for Metropolitan Studies, Atlee E. Shidler, who gave us the kind of support that derives only from a generous, enlightened, and professional administrator.

Dorothy K. Newman

Dawn Day