The convexity-cone approach to comparative risk and downside risk.

Based on Jewitt (1986) we try to find a characterization of comparative downside risk aversion and love. The desired characterizations involve the decomposition of the dual of the intersection of two convexity cones. The decomposition holds in the case of downside risk love, but not in the case of downside risk aversion. A counterexample is provided.Convexity cones; risk; downside risk; risk aversion; dual cones

The convexity-cone approach to comparative risk and downside risk

Based on Jewitt (1986) we try to find a characterization of comparative downside risk aversion and love. The desired characterizations involve the decomposition of the dual of the intersection of two convexity cones. The decomposition holds in the case of downside risk love, but not in the case of downside risk aversion. A counterexample is provided.Based on Jewitt (1986) we try to find a characterization of comparative downside risk aversion and love. The desired characterizations involve the decomposition of the dual of the intersection of two convexity cones. The decomposition holds in the case of downside risk love, but not in the case of downside risk aversion. A counterexample is provided.Non-Refereed Working Papers / of national relevance onl

Selection and Gratitude: Anonymity and gratitude

What kind of candidate is selected into a job when the principal has to appoint a committee to measure the candidate's ability and select a winner through a call specifying a wage for the job? In a model where the principal fixes the wage anticipating the committee's choice, under a rather natural assumption about the committee's objective we find that if the committee takes into account the candidate's gratitude a candidate with less than first best ability will be selected in equilibrium. First best selection is achieved if the committee is anonymous to the candidates. If the committee could also set the wage the first best candidate would be selected, but the principal would be worse off hence he would not implement full delegation

Damned If You Do and Damned If You Don’t: Two Masters

We study common agency problems in which principals (groups) make costly commit- ments to incentives that are conditioned on imperfect signals of the agent’s action. Our framework allows for incentives to be either rewards or punishments and an equilibrium al- ways exists. For our canonical example with two principals we obtain a unique equilibrium, which typically involves randomization by both principals. Greater similarity between prin- cipals leads to more aggressive competition. The principals weakly prefer punishment to rewards, sometimes strictly. With rewards an agent voluntarily joins both groups; with pun- ishment it depends on whether severe punishments are feasible and cheap for the principals. We study whether introducing an attractive compromise reduces competition between prin- cipals. Our framework of imperfect monitoring offers a natural perturbation of the standard common agency model, which results in sharper equilibrium predictions. The limit equilib- rium prediction provides support to both truthful equilibria and the competing notion of natural equilibria, which unlike the former may be inefficient

Anterior palatoplasty: Effectiveness for treatment of simple snoring and mild osas

Positive airway pressure is the treatment of choice among obstructive sleep apnea syndrome patients. Among surgical options, multilevel approach is a good option in patients with an involvement of all tract of first airway. The aim of the present work is to establish the efficacy of anterior palatoplasty in the treatment of selected patients with mild obstructive sleep apnea syndrome or simple snoring, within a multilevel surgery. The group was composed of 16 mild obstructive sleep apnea syndrome adult patients collected from January 2015 to June 2016 at University of Palermo, Ear, Nose and Throat Department. To make diagnosis of obstructive sleep apnea syndrome, we employed polysomnography, the Epworth Sleepiness Scale and an endoscopic study of aerodigestive tract in order to identify the sites of collapse. All patients underwent to inferior turbinate reduction, anterior pharyngoplasty and hyoid suspension. After treatment, 11 patients had Apnea Hypopnea Index â ¤5 and 4 patients less than 50% compared to the starting one. According to Epworth Sleepiness Scale, the daytime sleepiness enhanced from 12.6 to 8.6 post-operative average. Pre-operative mean value of Mullerâ s maneuver was N (nose):2.6, O (oropharinx): 3.4, H (hypopharinx):2.5 Before performing surgical procedure each patient was subjected to sleep endoscopy to evaluate better the pattern of collapse. The post-operative mean outcomes of Muellerâ s Maneuver was: N 1.5, O 1.3, H 1.3. Barbed Anterior pharyngoplasty, combined with other surgical procedures, can be considered a valid surgical option to relieve snoring, and mild apnoic events. Our preliminary results, show that the anterior palatoplasty, combined with other surgical procedures, can be considered a valid surgical option to relieve snoring and mild apnoic events

ARMONIZZAZIONE E CONDIVISIONE INTEROPERABILE DI DATI GEOSPAZIALI MULTI TEMPORALI PER LA GESTIONE DEL PAESAGGIO RURALE

Recently, practitioners and researchers dealing with rural landscape analysis and characterization are facing the challenge of managing and sharing huge amount of geospatial data and information. Thanks to the internet diffusion and speed, it is easier to share data in the World Wide Web. It is worth highlighting that the data sharing process can improve participatory planning processes. Moreover, is also allows an easy comparison among different landscape areas. Sharing can be done with varying degrees of interoperability and different software tools, proprietary as well as free and open source (FOSS). A widespread way to share geospatial data and metadata is by Spatial Data Infrastructures (SDIs) taking advantages on the use of Open Geospatial Consortium (OGC) standards. By the way, data sharing through OGC services lack in data harmonization and in semantic enablement, thus making difficult compare, search and analyze data given by different sources. Different data schemas and linguistic barrier hinder the usefulness of data obtained from different sources. To overcome these limitations, in this study we show a novel data workflow implemented for sharing in an interoperable, harmonized and semantically enriched way, multi-temporal land cover (LC) datasets collected in a previous landscape characterization researches