“…Looking at the parameters on the two reproduced factors, K and G, they sum to a þ 1 2 : as long as a < 1 2 , this is not large enough to yield endogenous growth, but rather convergent growth with a multiplier relative to the exogenous rate of technical progress, g, of 3 1À2a (so, for example, the multiplier on growth, with a ¼ 0:1, would be 3.75). When a ¼ 1 2 , we have a variant of the Barro (1990) endogenous growth model, which is essentially similar to the model in Carter and Temple (2017) where neoclassical growth is amplified, except that the driver of amplified growth in our model is through taxation and investment in the public good, G.…”