This is an econometric study of the roundwood market and, in particular, the supply of roundwood from private nonindustrial forest lands in Sweden from 1961-1984. The independent variables of the supply function are the price of roundwood, the unit felling cost, the net (post-taxation) real rate of return on capital, and the resource inventory of mature trees ready for final feiling. The short-run roundwood demand is dependent on capacity, roundwood short-run average revenue product and the price of roundwood. All the coefficients exhibited the signs suggested by economic theory. For. Sci. 35(4):946-961.