Non-scale models of economic growth

Growth models that incorporate non-rivalry and/or externalities imply that the size of an economy may influence its long-run growth rate. Such implied scale effects run counter to empirical evidence. This paper develops a gen eral growth model to examine conditions under which balanced growth is void of scale effects. The model is general enough to replicate well known exog enous, as well as endogenous, (non-) scale models. We derive a series of pr opositions that show that these conditions for non-scale balanced growth ca n be grouped into three categories that pertain to (i) functional forms, (i i) the production structure, and (iii) returns to scale.