This paper introduces and discusses an heuristic model meant to clarify why and how economic instability may play a crucial role in a modern sophisticated monetary economy. In this model economic instability is specified in terms of structural instability rather than in the usual terms of dynamic instability. This different view of instability implies a different approach to the analysis of the...

Economic values for calving performance in first and later parities were estimated for the Piemontese cattle. Calving performance is a threshold trait usually recorded using a scoring system with categories corresponding to the rate of difficulty. In the Piemontese breed five categories were adopted (from unassisted to foetotomy). A normal underlying distribution with thresholds corresponding t...

A 3-yr field study was conducted at commercial juice grape (Vitis labrusca L.) vineyards to develop an economic injury level (EIL) for grape berry moth, Paralobesia viteana (Clemens) (Lepidoptera: Tortricidae) and to determine patterns of cluster injury. Infestation of grape clusters by P. viteana was measured biweekly from bloom until harvest, and fruit was sampled immediately before harvest t...

We study risk aversion and prudence in medical treatment decisions. In a laboratory experiment, we investigate the frequency and intensity of secondand third-order risk preferences, as well as the eff ect of the medical decision context. Risk preferences are assessed through treatment thresholds (the indiff erence point between not treating and treating). Under diagnostic risk, medical decision...

As the demand for the civil aviation has been growing for decades and the system becoming increasingly complex, the use of systems engineering and operations research tools have shown to be of further use in managing this system. In this study, we apply such tools in managing landing operations on runways (as the bottleneck and highly valuable resources of air transportation networks) to handle...

This paper studies the dynamics of an economic growth model with global warming. Recent research on climate change suggests that there exists a negative feedback effect from global surface temperature and the capacity of the earth to reflect radiation. Our paper takes into account that the ratio of reflected to incident radiation of the earth, i.e. the albedo, negatively depends on the average ...