Evaluating risks-based communities of Mafia companies: a complex networks perspective

This paper presents a data-driven complex network approach, to show similarities and differences-in terms of financial risks-between the companies involved in organized crime businesses and those who are not. At this aim, we construct and explore two networks under the assumption that highly connected companies hold similar financial risk profiles of large entity. Companies risk profiles are captured by a statistically consistent overall risk indicator, which is obtained by suitably aggregating four financial risk ratios. The community structures of the networks are analyzed under a statistical perspective, by implementing a rank-size analysis and by investigating the features of their distributions through entropic comparisons. The theoretical model is empirically validated through a high quality dataset of Italian companies. Results highlights remarkable differences between the considered sets of companies, with a higher heterogeneity and a general higher risk profiles in companies traceable back to a crime organization environment

IFRS adoption. Evidences from Italian companies

Nowadays Italian listed and non listed companies adopt two distinct set of accounting principles. Starting from 2005 the mandatory adoption of IFRS for all listed companies stimulated a huge process of change which involves not only the technicalities about recognition, measurement and disclosure of accounting events, but also entails a cultural revolution in our accounting tradition developed through more than 100 years. In this paper are shown the findings of a research project whose purpose was to identify the most relevant impacts produced by IFRS adoption on company information systems and performance analysis and management. The basic research hypothesis is that the differences between domestic accounting principles and IFRS determine changes in company information systems. This changes involve the whole information production process: collection of data, manipulation and communication of information. Just as example we could think at impairment test: its application require the acquisition of conjectured information, from internal information sources i.e. the management information system, or from external sources. Moreover, as a second research hypothesis, IFRS adoption improve the company disclosure with a wider set of management information (i.e. about business combination, segmental reporting, or transactions with related parties) this should create a convergence tendency between external reporting with those required by internal users. The research was developed through a first step of deep analysis of both the theoretical contributions and the set of IFRS, in order to identify the range of possible implication induced on Italian listed companies, in their management control systems, information systems, and performance indicators. Afterwards the hypothesis about the implications of IFRS adoption have been tested employing the case studies technique. In brief the results show that only a limited number of IFRS generate significant implications on management control systems, because increase the diffusion of dimensions and indicators formerly not widely employed (at least on Italian context). Instead by the side of information systems is possible to determine more relevant implications caused by the introduction of new applications useful to produce the new set of mandatory information. Finally, a limited set of research hypothesis, not even confirmed by the empirical test, drew possibilities for IFRS adoption to stimulate changes on management information processes: for example the adoption of fair value accounting for property, plants and equipments, should produce consequences on product costing methodologies. The results don\u2019t confirm this hypothesis, showing the existence of a kind of double track in elaboration processes which keep separate external from internal reporting: the former IFRS compliant, the second still connected with the traditional accounting principles. This paper gives a deeper description of the implications related to the adoption of IAS 1 for what concern the construction and analysis of the income statement

Sorting Through Waste Management Literature. A Text Mining Approach to a Literature Review

With sustainability and management of waste as focus of multiple disciplines, there is still a considerable gap in the academic literature in regard to the definition of \u201cwaste management\u201d. The present research addresses the issue of a substantial lack of an acceptable interdisciplinary definition of waste management by means of synthesizing existing literature on the matter and identifying the most recurrent and relevant waste management concepts by applying the method of text mining. The results allow gaining a deeper understanding of (1) the typical concepts of each scientific discipline that studies waste management, (2) cross-disciplinary concept differences and similarities, and (3) the concept networks that can become potential building blocks of the waste management studies definition. Finally, a number of future research directions and propositions are suggested

Ultralight vector dark matter search using data from the KAGRA O3GK run

Among the various candidates for dark matter (DM), ultralight vector DM can be probed by laser interferometric gravitational wave detectors through the measurement of oscillating length changes in the arm cavities. In this context, KAGRA has a unique feature due to differing compositions of its mirrors, enhancing the signal of vector DM in the length change in the auxiliary channels. Here we present the result of a search for U(1)B−L gauge boson DM using the KAGRA data from auxiliary length channels during the first joint observation run together with GEO600. By applying our search pipeline, which takes into account the stochastic nature of ultralight DM, upper bounds on the coupling strength between the U(1)B−L gauge boson and ordinary matter are obtained for a range of DM masses. While our constraints are less stringent than those derived from previous experiments, this study demonstrates the applicability of our method to the lower-mass vector DM search, which is made difficult in this measurement by the short observation time compared to the auto-correlation time scale of DM

Search for eccentric black hole coalescences during the third observing run of LIGO and Virgo

Despite the growing number of confident binary black hole coalescences observed through gravitational waves so far, the astrophysical origin of these binaries remains uncertain. Orbital eccentricity is one of the clearest tracers of binary formation channels. Identifying binary eccentricity, however, remains challenging due to the limited availability of gravitational waveforms that include effects of eccentricity. Here, we present observational results for a waveform-independent search sensitive to eccentric black hole coalescences, covering the third observing run (O3) of the LIGO and Virgo detectors. We identified no new high-significance candidates beyond those that were already identified with searches focusing on quasi-circular binaries. We determine the sensitivity of our search to high-mass (total mass M>70 M⊙) binaries covering eccentricities up to 0.3 at 15 Hz orbital frequency, and use this to compare model predictions to search results. Assuming all detections are indeed quasi-circular, for our fiducial population model, we place an upper limit for the merger rate density of high-mass binaries with eccentricities 0<e≤0.3 at 0.33 Gpc−3 yr−1 at 90\% confidence level

Verso una definizione condivisa di imprenditore sociale

Il concetto di imprenditore sociale stimola l\u2019interesse di accademici e non. La comunit\ue0 scientifica ha prevalentemente seguito un approccio costruttivista nell\u2019elaborare le definizioni di imprenditore sociale. Conseguentemente, si riscontrano numerose definizioni, parziali, basate per lo pi\uf9 sulla dicotomia: valore sociale vs. valore economico. Sposare una concezione olistica di valore potrebbe essere la strada che conduce a una definizione condivisa di social entrepreneur. Il profitto dell\u2019imprenditore non rappresenta il parametro discriminatorio tra imprenditore tout court e sociale; l\u2019etica potrebbe invece esserlo

Financial Crises and Earnings Management Behavior. Arguments and Evidence Against Causality

This book approaches the question of the relation between financial crises and earnings management from two philosophical perspectives: positivism and critical realism. The results obtained using the positivist approach indicate that financial crises tend to have no consistent effect on earnings quality since managers\u2019 earnings behavior does not differ from the pre-crisis to the crisis period. The author accordingly argues against the existence of a causal law based on a constant conjunction model (i.e., whenever a financial crisis happens, earnings management occurs) and concludes that financial crises cannot be seen as the cause of earnings management. The critical realism perspective, on the other hand, casts light on managers\u2019 reasons for acting like an earnings manager; in conjunction with the more traditional positivist approach, it assists in refuting the idea of financial crises as a generative mechanism for earnings management. The author concludes by exploring other structures at work that might be responsible for earnings management. This book will be of interest to both academics and a wide range of professionals