the paper discusses the idea that the quality of exports matters for economic growth. the influence of the structure of exports on the rates of economic growth is discussed within the context of a growth model with external constraints. to test the relationship between exports and growth, exports are divided in two groups: a) dynamic from a schumpeterian perspective (high-tech sectors) and b) dynamic from a keynesian perspective (international demand grows at higher rates than the average). the key hypothesis is that countries whose total exports have higher shares of sectors with keynesian and schumpeterian efficiency will grow faster. the empirical results are consistent with this hypothesis. in addition, the results suggest that schumpeterian efficiency tends to have a stronger impact on growth than keynesian efficiency.