750 research outputs found
Bank Concentration and Structure of Manufacturing Sectors: Differences Between High and Low Income Countries
This paper investigates the relationship between bank concentration and the real economy by analyzing the number and average size of firms in manufacturing industries in two samples of countries with differing levels of economic development. We use a panel of 42 countries and 27 manufacturing industries for the period 1993-2001, and we apply the Rajan-Zingales (1998) methodology. The main finding is that in developed countries higher levels of bank concentration are associated with lower number of firms, of bigger size, while in developing countries this relationship does not seem to be significant.Bank concentration; Industry structure; Country income groups;
Macroeconomic Models Used for the Impact Evaluation of the Structural Funds in Objective 1 Economies
The paper reviews the literature on the evaluation of the macroeconomic of the EU Structural Funds and it focuses on the macroeconomic models used by the European Commission for the assessment of the Objective 1 Community and Structural Frameworks. It emerges that more detailed Structural Funds expenditure data as well as macroeconometric models taking into account spatial interaction effects and industry dimension are needed to better evaluate the impact of EU Funds at regional level.EU Structural Funds impact evaluation; Macroeconomic models;
A Concrete Composite 2-Higgs Doublet Model
We consider a Composite Higgs Model (CHM) with two isospin doublet Higgs
fields arising as pseudo Nambu-Goldstone bosons from a breaking. The main focus of this work is to
explicitly compute the properties of these Higgses in terms of the fundamental
parameters of the composite sector such as masses, Yukawa and gauge couplings
of the new spin-1 and spin-1/2 resonances. Concretely, we calculate the Higgs
potential at one-loop level through the Coleman-Weinberg mechanism from the
explicit breaking of the global symmetry by the partial
compositeness of fermions and gauge bosons. We derive then the phenomenological
properties of the Higgs states and highlight the main signatures of this
Composite 2-Higgs Doublet Model at the Large Hadron Collider, including
modifications to the SM-like Higgs couplings as well as production and decay
channels of heavier Higgs bosons. We also consider flavour bounds that are
typical of CHMs with more than one Higgs doublet.Comment: 45 pages, 16 figures, version accepted for publication in JHE
Extra Higgs Boson and as Portals to Signatures of Heavy Neutrinos at the LHC
In this paper, we discuss the potential of observing heavy neutrino ()
signatures of a enlarged Standard Model (SM) encompassing three
heavy Majorana neutrinos alongside the known light neutrino states at the Large
Hadron Collider (LHC). We exploit the theoretical decay via a pair of heavy
(non-SM-like) Higgs boson and production followed by and decays, ultimately
yielding a signature and, depending upon how boosted
the final state objects are, we define different possible selections aimed at
improving the signal to background ratio in LHC Run 2 data for a wide range of
heavy neutrino masses.Comment: 31 pages, 10 figures. arXiv admin note: text overlap with
arXiv:1612.0597
Job Insecurity and Financial Distress
This paper investigates the effects of different job categories on householdsâ likelihood of experiencing financial distress. Given imperfect financial markets and the absence of unemployment subsidies, households with less secure jobs are likely to experience drops in income more frequently than households with well-protected jobs. Householdsâ abilities to deal with financial decisions (i.e. financial literacy) can mitigate these problems. Our results suggest that greater job insecurity increases the probability of being in financial distress similarly than other working statuses (e.g. unemployment), and in some cases even more (i.e. part-time workers). However, a high level of financial literacy can counterbalance this effect, especially for atypical workers
Phenomenology of minimal Z' models: from the LHC to the GUT scale
We consider a class of minimal abelian extensions of the Standard Model with
an extra neutral gauge boson at the TeV scale. In these scenarios an
extended scalar sector and heavy right-handed neutrinos are naturally
envisaged. We present some of their striking signatures at the Large Hadron
Collider, the most interesting arising from a decaying to heavy neutrino
pairs as well as a heavy scalar decaying to two Standard Model Higgses. Using
renormalisation group methods, we characterise the high energy behaviours of
these extensions and exploit the constraints imposed by the embedding into a
wider GUT scenario.Comment: 6 pages, 4 figures. Reference list updated. Contribution to the
proceedings of the 8th International Workshop on QCD - Theory and Experiment
(QCD@Work 2016), 27-30 Jun 2016. Martina Franca, Ital
, Higgses and heavy neutrinos in models: from the LHC to the GUT scale
We study a class of non-exotic minimal extensions of the Standard
Model, which includes all scenarios that are anomaly-free with the ordinary
fermion content augmented by one Right-Handed neutrino per generation, wherein
the new Abelian gauge group is spontaneously broken by the non-zero Vacuum
Expectation Value of an additional Higgs singlet field, in turn providing mass
to a state. By adopting the example, whose results can be recast
into those pertaining to the whole aforementioned class, and allowing for both
scalar and gauge mixing, we first extract the surviving parameter space in
presence of up-to-date theoretical and experimental constraints. Over the
corresponding parameter configurations, we then delineate the high energy
behaviour of such constructs in terms of their stability and perturbativity.
Finally, we highlight key production and decay channels of the new states
entering the spectra of this class of models, i.e., heavy neutrinos, a second
Higgs state and the , which are amenable to experimental investigation at
the Large Hadron Collider. We therefore set the stage to establish a direct
link between measurements obtainable at the Electro-Weak scale and the dynamics
of the underlying model up to those where a Grand Unification Theory embedding
a can be realised.Comment: 32 pages, 59 figures, journal versio
Be Decay Anomaly and Light
In this proceedings, we discuss a light (17 MeV) solution to the anomaly
observed in the decay of Beryllium-8 by the Atomki collaboration. We detail an
anomaly free model with minimal particle content which can satisfy all other
experimental constraints with gauge couplings .Comment: Prepared for the 2019 EW session of the 54th Rencontres de Moriond,
talk presented by Simon Kin
Bank Concentration and Structure of Manufacturing Sectors: Differences Between High and Low Income Countries
This paper investigates the relationship between bank concentration and the real economy by analyzing the number and average size of firms in manufacturing industries in two samples of countries with differing levels of economic development. We use a panel of 42 countries and 27 manufacturing industries for the period 1993-2001, and we apply the Rajan-Zingales (1998) methodology. The main finding is that in developed countries higher levels of bank concentration are associated with lower number of firms, of bigger size, while in developing countries this relationship does not seem to be significant
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