Up methods in the allocation of indivisibilities when preferences are single-peaked.

We consider allocation problems with indivisible goods when agents' preferences are single-peaked. We propose natural rules (called up methods) to solve such a class of problems. We analyzed the properties those methods satisfy and we provide a characterization of them. We also prove that these methods can be interpreted as extensions to the indivisible case of the so-called equal-distance rule.Allocation problem, indivisibilities, single-peaked preferences, standard of comparison, up method.

Allocation problems with indivisibilities when preferences are single-peaked.

We consider allocation problems with indivisible goods when agents' preferences are single-peaked. In this paper we identify the family of efficient, fair and non-manipulable solutions. We refer to such a family as M-temporary satisfaction methods. Besides, we provide arguments to defend these methods as extensions to the indivisible case of the so-called uniform rule.Allocation problem, indivisibilities, single-peaked preferences, standard of comparison, temporary satisfaction methods.

The impact of financial position on investment: an anlysis for non-financial corporations in the euro area

This paper analyses the impact that firms financial position has on investment decisions using panel data from a large sample of non-financial corporations(around 120,000 firms) in six euro area countries(Belgium, Germany, France, Italy, the Netherlands and Spain). The results indicate that financial position is important to explain capital expenditures, as financial pressure appears relevant in explaining investment dynamics when it is proxied by cash flow, indebtedness and debt burden. The results also show di¤erences in the sensitivity of investment rates to changes in financial pressure across countries, which appears to be especially large in the Netherlands and Italy and relatively small in Germany. JEL Classification: C33, E22, G32, J23balance sheet channel, Financial pressure, fixed investment, panel data

Explaining the money demand of non-financial corporations in the Euro area: A macro and a micro view

This paper analyses euro area non-financial corporations (NFC) money demand, both from a macro and a microeconomic point of view. At a macro level, money holdings are modelled as a function of real gross added value, the price level, the long-term interest rate on bank lending to non-financial corporations, the own rate of return on M3 and the real capital stock of the NFC sector. The results indicate that NFCs’ money holdings adjust quickly when deviations from their long-run level are registered, and that the large increase observed recently in NFCs’ money holdings has been driven by changes in their fundamentals and hence they stand in line with their long-run equilibrium level. The disaggregated analysis also shows that cash holdings are linked to balance-sheet ratios (such as non-liquid short term assets, tangible assets or indebtedness) and other variables such as the firm’ cash flow, its volatility or the size of the firm, which cannot be taken into account in the macro analysis. Likewise, results indicate that the main drivers of the increase in NFC cash holdings in the last years have been cyclical factors, captured by gross-added value and the cash-flow respectively. Variations in the opportunity cost of holding money, have also contributed to explain M3 developments but more modestly than at the end of the nineties, when its increase contributed negatively to cash accumulation. JEL Classification: E41, C23, C32, D21cointegrated VARs, Money demand, panel estimation

Financing obstacles and growth: an analysis for euro area non-financial corporations

This paper investigates whether financial obstacles, and, more generally, financial pressure faced by firms, significantly affect firm growth. For this purpose, we use an unbalanced panel of about 1,000,000 observations for around 155,000 non-financial corporations in five euro area countries. In addition to the balance sheet information in this panel, we also rely on firm-level survey data. In this way we are able to work out a direct measure of the firms’ probability of facing financing obstacles. Our results indicate that, though based on few variables, this measure appears to be relevant in explaining firm growth in four out of the five countries considered. Other firm-level variables related to the financial pressure faced by firms, such as cash flow (debt burden) are found to exert a positive (negative) impact on firm growth, while the results for leverage are less clear-cut. JEL Classification: C23, E22, G32, L11, L25Financing Constraints, Firm Growth, panel data

An eMath Teacher TOOL for ACTIVE LEARNING FLEURY'S ALGORITHM

An eMathTeacher [Sánchez-Torrubia 2007a] is an eLearning on line self assessment tool that help students to active learning math algorithms by themselves, correcting their mistakes and providing them with clues to find the right solution. The tool presented in this paper is an example of this new concept on Computer Aided Instruction (CAI) resources and has been implemented as a Java applet and designed as an auxiliary instrument for both classroom teaching and individual practicing of Fleury’s algorithm. This tool, included within a set of eMathTeacher tools, has been designed as educational complement of Graph Algorithm active learning for first course students. Its characteristics of visualization, simplicity and interactivity, make this tutorial a great value pedagogical instrument

A Study on UWB-Aided Localization for Multi-UAV Systems in GNSS-Denied Environments

Unmanned Aerial Vehicles (UAVs) have seen an increased penetration in industrial applications in recent years. Some of those applications have to be carried out in GNSS-denied environments. For this reason, several localization systems have emerged as an alternative to GNSS-based systems such as Lidar and Visual Odometry, Inertial Measurement Units (IMUs), and over the past years also UWB-based systems. UWB technology has increased its popularity in the robotics field due to its high accuracy distance estimation from ranging measurements of wireless signals, even in non-line-of-sight measurements. However, the applicability of most of the UWB-based localization systems is limited because they rely on a fixed set of nodes, named anchors, which requires prior calibration. In this thesis, we present a localization system based on UWB technology with a built-in collaborative algorithm for the online autocalibration of the anchors. This autocalibration method, enables the anchors to be movable and thus, to be used in ad-doc and dynamic deployments. The system is based on Decawave's DWM1001 UWB transceivers. Compared to Decawave's autopositioning algorithm we drastically reduce the calibration time while increasing accuracy. We provide both experimental measurements and simulation results to demonstrate the usability of this algorithm. We also present a comparison between our UWB-based and other non-GNSS localization systems for UAVs positioning in indoor environments

Democratising Participatory Research

In this book Carmen Martinez-Vargas explores how academic participatory research and the way it is carried out can contribute to more, or less, social justice. Adopting theoretical and empirical approaches, and addressing multiple complex, intersectional issues, this book offers inspiration for scholars and practitioners to open up alternative pathways to social justice, viewed through a Global South lens. Martinez-Vargas examines the colonial roots of research and emphasises the importance of problematising current practices and limitations in order to establish more just and democratic participatory research practices. Although practitioners have been challenging the Western roots of research and participatory research for decades, their goals can be compromised by pluralities and contradictions in the field. This book aims not to replicate past participatory research approaches, but to offer an innovative theoretical foundation—the Capabilities Approach—and an innovative participatory practice called ‘Democratic Capabilities Research’. Democratising Participatory Research is not only timely and relevant in South Africa, but also in the Global North owing to the current crisis of values jeopardising the peaceful existence of diverse societies. The book gives essential recommendations for capabilities and human development scholars to reframe their perspectives and uses of the Capabilities Approach, as well as for participatory practitioners to critically reflect on their practices and their often limited conceptualisation of participation