Abstract
This paper assesses a number of factors (within the conceptual framework of Braudelian time scales) which have contributed to a downward spiral in the Siberian and Far Eastern economies under perestroyka. A key role is played by the changing, increasingly negative linkages between West Siberia and the European USSR (given depletion of the most commercially viable Siberian oil and gas reserves and changing world market prices) and the long lead times and uncertain prospects for development of East Siberian and Far Eastern resources.