"Human capital," "ideas" and "knowledge" have been used as interchangeable, almost synonymous terms, representing knowledge-related factors in the neoclassical literature on growth. This paper emphasizes the differences between different forms of knowledge and tests the response of a standard...

We present a model of growth à la Lucas with two 'competing' factors. The first needs to allocate its time between production, accumulation and a non productive activity (rest or leisure). The second can devote its time simply to production and accumulation. The two factors can generate harmful...