In this paper I aim to show through an analysis from a history of economic thought perspective that Harrod's famous model, An Essay in Dynamic Theory (1939), can be considered a fundamental example of cumulative growth circle. Having described the original model, I then go on to examine the...

In this paper I consider the 1991 Grossman-Helpman model which analyses the role of innovation on growth. The model assumes constant returns to scale. I intend to show what happen in this model if I assume strong increasing returns. In particular, under the assumption of increasing returns of...