A mail/telephone technique is discussed which achieved a 79 percent response rate at a cost per usable survey which was only about 50 percent above the general average costs for using mailed questionnaires. With proper follow-up techniques this method is capable of yielding even higher response...

Shortages of wood for burning and construction have begun to create serious environmental problems in sub-Saharan Africa. Kenya is of particular interest both because of its high population pressure and its commitment to au active reforestation movement. This paper examines the contribution that...

Grapevine leafroll disease (GLRD) presently threatens the grape and wine industry worldwide. We develop a cellular automata model of GLRD diffusion and control in two ecologically-connected, independently-managed vineyards. One vineyard produces high-value wine grapes whereas the other produces...

Dynamic adjustment is an integral part of natural resource economics. Commonly, capital is assumed to respond instantaneously to changes in profits, while in reality adjustment may take place only with a time lag. In this paper, an empirical analysis of capital (boat) dynamics in the North Sea...