The relationships between economic growth and environmental pressures are complex. Since the early nineties, the debate on these relationships has been strongly influenced by the Environmental Kuznets Curve hypothesis, which states that during the first stage of economic development...

Evidence exists that many natural facts are described better as a fractal. Although fractals are very useful for describing nature, it is also appropiate to review the concept of random fractal in finance. Due to the extraordinary importance of Brownian motion in physics, chemistry or biology,...

Different recent works have shown that Spanish economic research has increased its international presence during the nineties. These works have also found that there is a duality in the diffusion of the research through national or international journals in function of the considered research...

A new class of games called Financial games is defined. These games are market games and it is showed that they are a generalization of Bankruptcy games. The algebraic structure of this class of games is studied and necessary conditions for a game to be financial are stated. The proportional...

Recent theoretical models of economic growth have emphasised the role of external effects on the accumulation of factors of production. Although most of the literature has considered the externalities across firms within a region, in this paper we go a step further and consider the possibility...

The lack of suitable critical values for the Dickey-Fuller integrability test in finite-samples can drive researchers to spurious conclusions when using asymptotic critical values. In this paper we estimate response surfaces for the Dickey-Fuller unit root test with structural breaks that allow...

The objective of this study is to analyse the technical or productive efficiency of the refuse collection services in 75 municipalities located in the Spanish region of Catalonia. The analysis has been carried out using various techniques. Firstly we have calculated a deterministic parametric...

This paper analyses the relation between parents earnings and their childrens education. In a context of perfect altruism, the model describes parents decisions on how much to consume and how much to invest in their childrens education. The model predicts that returns on education in terms of...

In the last decade, different studies have tried to contrast empirically the existence of a relationship between local human capital and the productivity of a given territory, and the possible presence of external economies. The most common result has been the finding of a positive relationship...

In this paper we analyze the time of ruin in a risk process with the interclaim times being Erlang(n) distributed and a constant dividend barrier. We obtain an integro-differential equation for the Laplace Transform of the time of ruin. Explicit solutions for the moments of the time of ruin are...