Discussion of economics of exhaustible resource in its modern form stemmed from Hotellings 1931 paper. The principles of optimal resource utilisation are now fairly clearly understood in the context of centrally planned economies but it is only since Hotellings paper that there has been a limited amount of work done on the description of behaviour of resource extractors in a market economy and there has still been virtually no work done in this literature on government policy over natural resources and their extraction in a market economy with the exception of a brief cryptic passage in Hotellings paper. Since Hotellings paper is an obvious point of departure for the exercises of the present it is worth summarising his framework.