This document discusses endogenous growth theory and compares it to the neoclassical growth model. It summarizes two core endogenous growth models: the AK model and a "learning by doing" model. The AK model endogenizes long-run growth by having output be a linear function of capital alone. This causes savings rates to permanently impact the growth rate. The "learning by doing" model features knowledge spillovers that increase productivity based on average capital levels. Both models generate sustained long-run growth, unlike the neoclassical model. The document then discusses how international capital market integration can further boost growth by allowing more efficient global allocation of capital.