Modeling growth: exogenous, endogenous and Schumpeterian growth models

In this lecture, I review the theoretical origins of the empirical growth models. I begin with the Solow and AK models informed by neoclassical theory. I demonstrate that both models do not make an explicit distinction between capital accumulation and technological progress. They just lump together the physical and human capital. Then I discuss the Schumpeterian growth models with creative destruction and institutions (particularly democracy as a meta-institution). I demonstrate that the Schumpeterian models can address a wider range of questions – particularly those that cannot be addressed satisfactorily by neoclassical models. I conclude by arguing for innovations in growth modeling – particularly for innovations that involve explicit incorporation of product-market competition and non-linearities in the relationship between innovation and growth.