The Frankel, Romer and Lucas theories of endogenous growth rest on the assumptions of knowledge-based externalities and price-taking representative agents. It is argued that, in a context of long-run growth, these assumptions are mutually incompatible, that representative agents will cooperate...

We construct a two-sector endogenous growth model in which productive government spending is essential for sustaining an economy's long-run growth. It is shown that, like the original one-sector [Barro, R.J., 1990. Government spending in a simple model of endogenous growth. Journal of Political...