Several senior natural resource analysts study the role played by innovation, particularly technological innovation, in the pursuit of heightened productivity. Increasing the output of a given input improves a firm's bottom line, makes it more competitive internationally, and reduces the potential for resource depletion and shortages. Thus, high productivity is a necessary ingredient of economic prosperity. This book illustrates the importance of technological innovation in achieving an acceptable level of output and efficiency.

In this important new offering, a team of resource scholars describes and chronicles the development of recent innovations in selected natural resource industries. The authors also reveal the causes, sources, and net effect of such innovation on productivity. In all of these sectors productivity has increased considerably since the early 1980s, although the level of improvement varies across industries. To what degree did technological innovation contribute to that increase?

Individual detailed case studies detail important innovations in America's coal, petroleum, copper, and forest industries. The primary focus is on extraction and production technologies, although the existence and importance of innovation in other areas such as management technique also enter the picture. For example, the combination of new technology with restructuring seems to have breathed new life into a floundering U.S. copper industry. The authors describe the origin and diffusion of important innovation, and the concluding chapter quantifies the net effect of such innovation on productivity.

R. David Simpson Norman L. Christensen, Jr. Human Activity and Ecosystem Function: Reconciling Economics and Ecology Recognizing the need to improve social decision making on tradeoffs between economic growth and ecological health, the Renewable Natural Resources Foundation convened a workshop in October 1995 on "Human Activity and Ecosystem Function: Reconciling Economics and Ecology. " While the subtitle perhaps reflected unrealistic expectations, the presentations and discus sions at the workshop were a preliminary step toward that rec onciliation: bringing together ecologists, economists, other nat ural and social scientists, and policy makers to layout the issues, articulate their needs and perspectives, and identify common ground for further work. This volume contains the pa pers presented and reports generated from the workshop. We emphasize ecology and economics in this discussion. We could argue that organizing our inquiry around these diSCiplines is only natural. Ecology is the study of behavior of organisms within complex systems composed of a myriad of other organ isms and their physical environments. Increasingly, this disci pline has focused on how interactions among biological and physical components influence the overall functioning of ecosys tems. These components are increasingly being determined by viii Ecosystem Function and Human Activities human activities. Economics is the study of how we decide which of our needs and wants we choose to satisfy given our limited re sources."