Fixed point theorems are the standard tool used to prove the existence of equilibria in mathematical economics. This paper shows how to prove a slight generalization of Brouwer's and Kakutani's fixed point theorems using the familiar techniques of drawing and shifting curves in the plane and is,...

This paper re-examines the interaction between population growth and income per capita in pre-industrial England. Our results suggest that, as early as two centuries preceding the Industrial Revolution, England had already escaped the Malthusian Epoch and entered a post-Malthusian regime, where...

The fundamental objective of the study presented in this article is to formulate a theoretical model with an empirical base that identifies the factors associated with the well-being of teachers, when they tackle processes of educational innovation mediated by the use of the information and...

This paper presents an innovative fuzzy regression approach for the assessment of the potential vulnerability of bridge to earthquakes. Taking the Mao-Luo-Hsi Bridge in Nantou County of Taiwan as an example, structural models representing vulnerable sections of the bridge are established and...

Within the scope of the International Decade ofNatural Disaster Reduction (IDNDR), cause-effectmodels of large landslides are being developed toestimate hazard. This work is based on a structuralexploration of the landslide areas mainly by seismicmethods. Information about the status of...

The aim of this study was to investigate the association between social support, loneliness and well-being from a multidimensional perspective for which two structural models are proposed. The study included 2042 participants from Malaga City (Spain) who were aged between 18 and 95 years. For...

We propose a structural model with a joint process of tangible assets (marker) and firm status for the pricing of corporate securities. The firm status is assumed to be latent or unobservable, and default occurs when the firm status process reaches a default threshold at the first time. The...

The aim of this paper is that of giving a finer insight into the analytic foundations of vector autoregressive models (VAR) in comparison with classical econometric models. To this end we show the links between the techniques of structural and VAR model building on the one hand, and the...

In the Black-Cox model, a firm defaults when its value hits an exponential barrier. Here, we propose an hybrid model that generalizes this framework. The default intensity can take two different values and switches when the firm value crosses a barrier. Of course, the intensity level is higher...