The extent to which fixed factors of production such as land constrain per-capita income growth has been a widely discussed topic in economics since at least Malthus (1798). Whether fixed factors limit growth depends crucially on two variables: the substitutability of fixed factors in...

Sectoral data features (i) changing relative expenditures of different sectors, (ii) non-constancy in relative prices and (iii) long-run trends in relative TFP growth rates across sectors. We provide a tractable theory of industry directed technical change, which is able to reconcile these...

The paper proposes a new model of development to describe a process of structural change of a dual economy. By introducing a novel sectoral division of the economic system into a low and a high-tech sector, the model builds on previous formulations and formalizes both a structure and a process...

What factors underlie industry differences in research intensity and productivity growth? We develop a multisector growth model using standard parameters to capture the main factors considered in the empirical R&D and productivity growth literature. Along the balanced growth path, we find that...

We develop a multi-sector general equilibrium model in which productivity growth is driven by the production of sector-specific knowledge. In the model, we find that long run differences in total factor productivity growth across sectors are independent of the parameters of the knowledge...

What is the social value of innovations in Schumpeterian growth models? This issue is tackled by introducing the concept of Lindahl equilibrium in a standard endogenous growth model with vertical innovations which is extended by explicitly considering knowledge diffusion on a Salop (1979)...

We study how exploration versus exploitation innovations impact economic growth through a tractable endogenous growth framework that contains multiple innovation sizes, multi-product firms, and entry/exit. Firms invest in exploration R&D to acquire new product lines and exploitation R&D to...

The objective of this article is to define the concept of network identity and to validate its role as a catalyst and its role to maintain in time the collaborative structure in order to achieve the goal of innovation. I have analyzed collaborative structures in various fields of activity in...

The directions of research on innovation or on the staging of innovative processes progress have evaluated over time from an innovational perspective constraint within an activity pursued by the entrepreneur (regarded as an entity creating possible and numerous innovative combinations) to an...

In this paper, we construct and estimate a unified model combining three of the main sources of cross-country income disparities: differences in factor endowments, barriers to technology adoption and the inappropriateness of frontier technologies to local conditions. The key components of our...