1,720,995 research outputs found
How the interbank market becomes systemically dangerous: an agent-based network model of financial distress propagation
Full text linkAssessing the stability of economic systems is a fundamental research fo= cus in economics that has become increasingly interdisciplinary in the curr= ently troubled economic climate. In particular, much attention has been dev= oted to the interbank lending market as an important diffusion channel for = financial distress during the recent crisis. In this paper, we study the st= ability of the interbank market to exogenous shocks using an agent-based ne= twork framework. Our model encompasses several ingredients that have been r= ecognized in the literature as procyclical triggers of financial distress i= n the banking system: credit and liquidity shocks through bilateral exposur= es, liquidity hoarding due to counterparty creditworthiness deterioration, = target leveraging policies and fire-sale spillovers. However, we exclude th= e possibility of central authorities intervention. We implement this framew= ork on a data set of 183 European banks that were publicly traded between 2= 004 and 2013. We document the extreme fragility of the interbank lending ma= rket up to 2008, when a systemic crisis leads to total depletion of market = equity with an increasing speed of market collapse. After 2008, the system = is more resilient to systemic events in terms of residual market equity. Ho= wever, the speed at which a crisis breaks out reaches a new maximum in 2011= , and it never returns to the values observed before 2007. Our analysis poi= nts to the key role that crisis outbreak speed plays: it sets the maximum d= elay for central authorities intervention to be effective
A fully digital rehabilitation for immediately loaded fixed in-terim complete-arch prosthesis: A case report
Full text linkThe digital workflows in implantology are becoming increasingly common, offering rehabilitation with predictable outcomes. However, there are instances where a fully digital workflow is not feasible, often requiring conventional methods such as when registering the patient’s occlusion. The present paper aimed to show a case report based on a digital workflow to make immediately loaded fixed interim complete-arch prostheses for a patient with terminal dentition. The key innovation lies in digitally capturing the patient’s maxillo-mandibular relationship, prior to the surgical procedure, by utilizing two dedicated “skeletal scan bodies” (ScanSke) and an intraoral scanner. These ScanSke were used as reference landmarks screwed onto mini-implants. In particular, these scan bodies were scanned with the maxillary complete arch before and after implant surgery, in order to be used as reference landmarks for the superimposition of the arches before and after the implant placement, maintaining the maxillary relationship with the antagonist arch
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Entangling Credit and Funding Shocks in Interbank Markets
Full text linkCredit and liquidity shocks represent main channels of financial contagion for interbank lending markets. On one hand, banks face potential losses whenever their counterparties are under distress and thus unable to fulfill their obligations. On the other hand, solvency constraints may force banks to recover lost fundings by selling their illiquid assets, resulting in effective losses in the presence of fire sales—that is, when funding shortcomings are widespread over the market. Because of the complex structure of the network of interbank exposures, these losses reverberate among banks and eventually get amplified, with potentially catastrophic consequences for the whole financial system. Inspired by the recently proposed Debt Rank, in this work we define a systemic risk metric that estimates the potential amplification of losses in interbank markets accounting for both credit and liquidity contagion channels: the Debt-Solvency Rank. We implement this framework on a dataset of 183 European banks that were publicly traded between 2004 and 2013, showing indeed that liquidity spillovers substantially increase systemic risk, and thus cannot be neglected in stress-test scenarios. We also provide additional evidence that the interbank market was extremely fragile up to the global financial crisis, becoming slightly more robust only afterwards
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Electrophoretic deposition of WS2 flakes on nanoholes arrays-role of used suspension medium
Full text linkHere we optimized the electrophoretic deposition process for the fabrication of WS2 plasmonic nanohole integrated structures. We showed how the conditions used for site-selective deposition influenced the properties of the deposited flakes. In particular, we investigated the effect of different suspension buffers used during the deposition both in the efficiency of the process and in the stability of WS2 flakes, which were deposited on an ordered arrays of plasmonic nanostructures. We observed that a proper buffer can significantly facilitate the deposition process, keeping the material stable with respect to oxidation and contamination. Moreover, the integrated plasmonic structures that can be prepared with this process can be applied to enhanced spectroscopies and for the preparation of 2D nanopores
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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