The Information Technology (IT), the Internet, or the Computing & Communications (C&C) technology revolution has been central to the economic discussion for several decades. Before the mid-1990s the catchword was the “productivity paradox” coined by Robert Solow, who stated in 1987 that...

I study the joint determination of market structure and growth in an oligopolistic economy. Firms run in-house R&D programs to produce over time a continuous flow of cost-reducing (incremental) innovations. In symmetric equilibrium, the dispersion of resources across firms prevents the...

'Top-of-the-line PCs and servers ... tend to be purchased by early adopters, technophiles who just can't wait' (Fortune, February 17, 1997). This paper constructs a model of quality improvements where multiple quality levels can sell due to differences in consumers' valuations of quality. Firms...

We consider an endogenous growth model with two sectors: an intermediate input (or "upstream") sector and a final product (or "downstream") sector. Innovation takes place in both sectors. Following Gilbert and Shapiro (1990), we define patent breadth as the ability of the innovator to reap...

In this paper we build an endogenous growth model where human capital and ideas are complements in the long-run equilibrium and technological progress takes the form of a continuous increase in the number of horizontally differentiated varieties of intermediate inputs. One peculiarity of the...

Evidence shows that firms build their market position by consistently investing in R&D over time and accumulating knowledge protected by secrecy, patents and other appropriability devices. To explore the macroeconomic implications of this fact, I construct an economy where oligopolistic firms...

Evidence shows that firms build their market position by consistently investing in R&D over time and accumulating knowledge protected by secrecy, patents and other appropriability devices. To explore the macroeconomic implications of this fact, I construct an economy where oligopolistic firms...

This paper discusses the role of economic integration in a model of endogenous growth where the size of the firm and the interactions between growth and the (endogenous) structure of the market play a crucial role. I focus on the pure scale effects of integration and study explicitly their...

I discuss a model of endogenous innovation that brings to the forefront the in-house R&D activity of the modern corporation. In a symmetric oligopoly, firms undertake cost-reducing R&D subject to a research technology with incomplete spillovers. Concentration of sales and R&D resources determine...

In this paper we build an endogenous growth model where human capital and ideas are complements in the long-run equilibrium and technological progress takes the form of a continuous increase in the number of horizontally differentiated varieties of intermediate inputs. One peculiarity of the...