ABSTRACT
This chapter examines the last group of growth models, which represent, together with those of the 'new economic geography'. It deals with models that investigate the endogenous determinants of an aggregate growth rate, as opposed to the individual microeconomic and micro-territorial elements of competitive or locational advantage typical of development theories. The aim of the models described, called 'models or theories of endogenous growth', is to identify the conditions endogenous to the productive system that ensure long-term positive growth. An interesting application of increasing returns in a strictly territorial production function is the neoclassical interregional model at increasing returns proposed by Takahiro Miyao. One of the first models of endogenous growth was formulated by Paul Romer. The model developed by Robert Lucas envisages two types of capital: physical and human. The Romer and Lucas models instead more closely resemble those of the new economic geography, or even the early models of regional growth, which were typically aspatial.
