This paper analyzes the equilibrium paths leading to a long-run stationary state in a one-sector model in which a self-reproducing non-basic is produced. It is shown that, provided external effects are absent, the equilibrium path is unique, although multiple long-run equilibria may exist under decreasing returns. When costs are decreasing, uniqueness of the equilibrium path is lost. Even local
... [Show full abstract] uniqueness may fail if strong scale economies in the use of primary resources and/or basic commodities are coupled with diseconomies in the use of the non-basic commodity.