Previous work on bioprospecting has suggested that the potential market returns to genetic resource conservation are likely to be inconsequential. This article shows that when the buyers of genetic resource options are also competitors in patent races, sellers can extract all the surplus...

Consider the following two well-diversified portfolios: the first consists of 100 preferred stocks and the second of 100 regular equity stocks. Which of the two portfolios is riskier? Common sense would seem to suggest that the equity portfolio is more risky. in terms of traditional concepts it...

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...

This paper analyzes how a horizon date affects valuation. We focus on valuation errors that arise because of the horizon, and we assess the magnitudes of such errors. A model due to Ohlson (1995) specifies the information environment. Forecasting of future financial outcomes depends on two kinds...