Regression studies have established that there tend to be convex, nonsymmetric relationships between relative price variability and the inflation rate, unanticipated inflation, and the change in the inflation rate. This paper shows that such regression results follow as "definitional artifacts"...

This paper incorporates uncertainty into the growth function of the Schaefer model for the optimal management of a biological resource. There is a critical value for the biological stock, and it is optimal to do no harvesting if the biological stock is below that critical value and to exert...