The infrastructure needed in developing countries, especially in rural areas, often makes providing state-of-the-art healthcare cost prohibitive. We describe a highly asynchronous service model for healthcare delivery that is inexpensive, at least compared to the usual implementation of...

Because energy conservation programs are generally voluntary, participating households are different from nonparticipants in important, energy-related ways. This self-selection bias complicates efforts to estimate energy savings due to these programs. This article discusses several methods for...

This article discusses the results of 2 alternative approaches for estimating the energy- savings impact of Department of Energy (DOE) conservation programs. The first approach analyzed program-by-program estimates that indicated DOEprograms reduced U. S. energy use by more than 0.5 quadrillion...