This note provides a simple characterization of the optimal extraction of a non-renewable resource. The proposed formula determines the solution in its feedback form. It is shown to hold for a large class of models, as long as the utility is stock-independent.

This paper investigates the changes in expenditure policy in oil-exporting countries during boom–bust in commodity price cycles, and their implications for real exchange rate movements. To do so, we introduce a Dutch disease model with downward rigidities in government spending to revenue...

In this paper we present empirical facts on oil exploitation and a model that can replicate some of these facts. In particular, we show that the time path of the oil price, on the one hand, and the extraction and discovery rate, on the other hand, seem to follow a U-shaped and an inverted...

This articles presents a new series of maps showing the climate and environmental variability of Botswana. Situated in southern Africa, Botswana has an arid to semi-arid climate, which significantly varies in its different regions: Kalahari Desert, Makgadikgadi Pan and Okavango Delta. While...

This study demonstrated the use of GRASS GIS scripts for satellite image analysis. The aim is to perform topographic and environmental analysis in eastern China, Shandong Province, Qingdao region. Variables include land surface temperature evaluated by correlation between the Landsat ETM+...