We construct a competitive model of innovation and growth under constant returns to scale. Previous models of growth under constant returns cannot model technological innovation. Current models of endogenous innovation rely on the interplay between increasing returns and monopolistic markets. In...

In the modern theory of growth, monopoly plays a crucial role both as a cause and an effect of innovation. Innovative firms, it is argued, would have insufficient incentive to innovate should the prospect of monopoly power not be present. This theme of monopoly runs throughout the theory of...

In the modern theory of innovation, monopoly plays a crucial role both as a cause and an effect of creative economic activity. Innovative firms, it is argued, would have insufficient incentive to innovate should the prospect of monopoly power not be present. This theme of monopoly runs...

In this paper we use a variety of data sources, both micro and macro, time series, cross section, and panel data to provide an empirical evaluation of the current level of economic wellbeing of the Spanish elderly, and of its determinants. We focus, in particular on the role played by the...

The extreme volatility of stock market values has been the subject of a large body of literature. Previous research focused on the short run because of a widespread belief that, in the long run, the market reverts to well understood fundamentals. Our work suggests this belief should be...

The data show that an increase in government provided old-age pensions is strongly correlated with a reduction in fertility. What type of model is consistent with this finding? We explore this question using two models of fertility, the one by Barro and Becker (1989), and the one inspired by...

We describe the historical evolution of the Spanish Social Security system and its current organization. Our attention concentrates on the main public pension scheme for private employees in the manufacturing and service sector (RGSS) which covers by far the largest majority of Spanish workers....

This paper evaluates the role of the construction sector in accounting for the performance of the U.S. economy in the last decade. During the Great Recession (2008-09), employment in the construction sector experienced an unprecedented decline that followed the largest expansion in total...

Which kind of intellectual property regime is more favorable to innovation: one that enforces patents or one that does not? Economic theory is unable to answer this question, as valid arguments can be made both for and against patents; hence we must turn to empirical evidence. In this paper, we...

This paper provides an interpretation of the evolution of Spanish private and national savings over the period 1960-1995. During these 35 years private and national saving rates oscillated widely from a very high level in the 1960s to historical minima in the early and mid-1980s to a strong...