This paper develops a two-sector R&D-based growth model with congestion effects from increasing urban population density. We show that endogenous technological progress causes structural change if there are positive productivity spillovers from the modern to the traditional sector and Engel's...

This paper proposes a theory for the gradual evolution of knowledge diffusion and growth over the very long run. A feedback mechanism between capital accumulation and the ease of knowledge diffusion explains a long epoch of (quasi-) stasis and an epoch of high growth linked by a gradual economic...

This article shows within a simple growth model how the make up of society affects economic performance when property rights are unenforceable. It investigates behavior of non-cooperative social groups that consume, produce, and appropriate resources either peacefully or through contest. For the...