The controversy over Intellectual Property Rights (patents and copyright) is here to stay. The steady accumulation of substantial empirical evidence casting serious doubts on the allegedly beneficial effects that iprs have on innovation and creativity is forcing an increasing number of...

This paper uses a simple general equilibrium models with residential investment and input-output structure to illustrate the effects of demand shocks in the productive economy. A decline in the demand for homes generates a readjustment of the portfolio, and a decline in the demand of...

We examine a competitive theory in which new ideas are introduced only when diminishing returns to the use of existing ideas sets in. After an idea is introduced, the capital associated with that idea expands, and the price of the idea falls. Once the price falls far enough, it becomes...

We try to build a quantitative-theoretical framework to understand the impact of immigration on the Spanish pension system, both during the last ten years and, more importantly, during the future fifty years. In other words, we look at the recent past in a tentative to predict the future....

In this paper, we model an overlapping generation economy affected by an unexpected immigration shock and determine how households would insure themselves against "immigration risks" efficiently. We use the model to study the impact of immigration on (i) the welfare of various generations, (ii)...

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...

This paper provides a turnpike-like theorem for multidimensional, optimal-growth models, which holds for evey level of the discount factor. It is shown that when the short-run return fu nction of the reduced-form model satisfies a certain sufficient condi tion, then the resulting dynamics is of...

We introduce two modifications into the standard real business cycles model: habit persistence preferences and limitations on intersectoral mobility. The resulting model is consistent with the observed mean equity premium, mean risk free rate and Sharpe ration on equity. With respect to the...