This paper seeks to identify the impact of the level of development on the return to export expansion, while controlling for capital and labor in a neoclassical rendering of an economy. The paper utilizes a switching regression estimation procedure to determine the level of development that best divides middle from high income countries as regards growth associated with export expansion. Such a division may be used, among other things, to provide an objective criterion for graduation from GSP (Generalized System of Preferences) treatment. The results suggest that the current GSP graduation level may be too high.