Are Asymmetrically Informed Agents Envious?

In most economies, a fair allocation does not exist. Thus, it seems that we are condemned to live in an unfair world, since we are not happy with what we have and we look at the others with envious eyes. In this paper we want to give an hope for a more equitable society.Asymmetric information; fair allocation; constrained market equilibrium; Maximin and Bayesian expected utility function.

The CIARD RING, an infrastructure for interoperability of agricultural research information services

Creating integrated information services in agriculture giving access and adding value to information residing in distributed sources remains a major challenge. In distributed architectures, value added services by definition interface several information sources / services. Therefore value added services cannot be built without an awareness of what others have done: which sources are available, how to tap into them, how to exploit their semantics. The Coherence in Information for Agricultural Research for Development (CIARD) Routemap to Information Nodes and Gateways (RING) is a portal offering an interlinked registry of existing information services in agriculture. The CIARD RING covers both information services and sources: in nowadays information architectures, the distinction between the two is very fluid. In the RING, the definition of "service" includes any form of providing information from one server instance (website, mail server, web services, XML archive...) to many clients (browsers, email clients, news readers, harvesters...) The services registered in the RING are described in details and categorized according to criteria that are relevant to the use of the service and its interoperability. The RING categorizes and interlinks the featured services according to criteria such as: standards adopted, vocabulary used, technology used, protocols implemented, level of interoperability etc. In addition, it features detailed instructions on how the registered services can be "interoperated". The vision is that the RING will become the common global technical platform for the community of agricultural information professionals for accessing, sharing and exchanging information through web services. This paper describes how the RING provides an infrastructure for enhancing interoperability of information sources and thus paves the way towards better accessibility of information through value-added and better targeted services

Dietary interventions to contrast the onset and progression of diabetic nephropathy. a critical survey of new data

This article is a critical overview of recent contributions on the dietary corrections and the foods that have been claimed to delay or hinder the onset of diabetic nephropathy (DN) and its progression to end-stage renal disease. Innovative dietary and behavioral approaches to the prevention and therapy of DN appear the more captivating in consideration of the rather well established protocols for glucose and blood pressure control in use. In addition to restricted caloric intake to contrast obesity and the metabolic syndrome, adjustments in the patient's macronutrients intake, and in particular some degree of reduction in protein, have been long considered in the prevention of DN progression. More recently, the focus has shifted to the source of proteins and the content of glycotoxins in the diet as well as to the role of specific micronutrients. Few clinical trials have specifically addressed the role of those micronutrients associated with diet proteins that show the most protective effect against DN. Research on clinical outcome and mechanisms of action of such micronutrients appears the most promising in order to develop both effective intervention on nutritional education of the patient and selection of functional foods capable of contrasting the onset and progression of DN

Longterm Influence of Inertia on the Diffusion of a Brownian Particle

We demonstrate experimentally that a Brownian particle is subject to inertial effects at long time scales. By using a blinking optical tweezers, we extend the range of previous experiments by several orders of magnitude up to a few seconds. The measured mean square displacement of a freely diffusing Brownian particle in a liquid shows a deviation from the Einstein-Smoluchowsky theory that diverges with time. These results are consistent with a generalized theory that takes into account not only the particle inertia but also the inertia of the fluid surrounding the particle. This can lead to a bias in the estimation of the diffusion coefficient from finite-time measurements. We show that the decay of the relative error is polynomial and not exponential and, therefore, can have significant effects at time scales relevant for experiments.Comment: 5 pages, 4 figure

A new perspective to rational expectations: maximin rational expectations equilibrium

We introduce a new notion of rational expectations equilibrium (REE) called maximin rational expectations equilibrium (MREE), which is based on the maximin expected utility (MEU) formulation. In particular, agents maximize maximin expected utility conditioned on their own private information and the information that the equilibrium prices generate. Maximin equilibrium allocations need not to be measurable with respect to the private information of each individual and with respect to the information that the equilibrium prices generate, as it is in the case of the Bayesian REE. We prove that a maximin REE exists universally (and not generically as in Radner (1979) and Allen (1981)), it is effcient and incentive compatible. These results are false for the Bayesian REE

Cage Size and Jump Precursors in Glass-Forming Liquids: Experiment and Simulations

Glassy dynamics is intermittent, as particles suddenly jump out of the cage formed by their neighbours, and heterogeneous, as these jumps are not uniformly distributed across the system. Relating these features of the dynamics to the diverse local environments explored by the particles is essential to rationalize the relaxation process. Here we investigate this issue characterizing the local environment of a particle with the amplitude of its short time vibrational motion, as determined by segmenting in cages and jumps the particle trajectories. Both simulations of supercooled liquids and experiments on colloidal suspensions show that particles in large cages are likely to jump after a small time-lag, and that, on average, the cage enlarges shortly before the particle jumps. At large time-lags, the cage has essentially a constant value, which is smaller for longer-lasting cages. Finally, we clarify how this coupling between cage size and duration controls the average behaviour and opens the way to a better understanding of the relaxation process in glass--forming liquids.Comment: Letter, 4 figure