I develop a framework for thinking about some aspects of sustainability. The framework is one for modeling the dynamic interactions of economic and biological systems, studying the time paths that can emerge from these, and then selecting one of these as optimal. I investigate alternative...

What is the nature of biodiversity as an economic commodity and why does it matter? How would its conservation contribute economically to our well being? I consider three issues: - Why is biodiversity important from an economic perspective? - hat kind of commodity is it? - oes our usual economic...

There is a widespread recognition that we need to revise our methods of measuring national income to incorporate better the impact of economic activity on environmental assets. Our aim here is to investigate alternative concepts of national income in a dynamic economy, one a generalization of...

The value of the services provided top human societies by natural ecosystems and biogeochemical cycles has recently been the topic of discussion and research. Here I review some of the basic economic principles necessary for understanding some of the questions that arise in this area. I argue...