7,736 research outputs found
Bank response to capital requirements: Theory and Indian evidence
The paper discusses the theory of how banks' respond to risk-based capital standards and conducts an empirical estimation to ascertain the response of banks to capital requirements in the Indian contextcapital; banking; India
Regulating Market Risks in Banks: A Comparison of Alternate Regulatory Regimes
Regulators have traditionally used simple models to measure the capital adequacy of banks. The growing internationalisation and universalisation of banking operations have meant that the same is no longer possible, as banks face increasing, and increasingly opaque, market risk. The significance of market risk has also been acknowledged in the New Capital Accord enunciated by the Basel Committee in 1999. The focus of the paper is on market risk, that is, any market related factor that affects the value of a position in the financial instrument or a portfolio of instruments. As it stands at present, the three commonly used approaches to regulating market risks in banks include the building block approach, internal model approach and precommitment approach. The paper evaluates the pros and cons of the various approaches and concludes with a discussion of the applicability of these models in the Indian context.VaR; banking; India; market risk
The effect of Wilson line moduli on CP-violation by soft supersymmetry breaking terms
The CP-violating phases in the soft supersymmetry-breaking sector in orbifold
compactifications with a continuous Wilson line are investigated. In this case
the modular symmetry is the Siegel modular group of genus two. In
particular, we study the case that the hidden sector non-perturbative
superpotential is determined by the Igusa cusp form of modular
weight 12. The effect of large non-perturbative corrections to the dilaton
K\"ahler potential on the resulting CP-violating phases is also investigated.Comment: LaTeX file, 12 pages plus 7 figures, to appear in Phys.Lett.
One Loop Beta Functions in Topologically Massive Gravity
We calculate the running of the three coupling constants in cosmological,
topologically massive 3d gravity. We find that \nu, the dimensionless
coefficient of the Chern-Simons term, has vanishing beta function. The flow of
the cosmological constant and Newton's constant depends on \nu, and for any
positive \nu there exist both a trivial and a nontrivial fixed point.Comment: 44 pages, 16 figure
Asymmetric Non-Abelian Orbifolds and Model Building
The rules for the free fermionic string model construction are extended to
include general non-abelian orbifold constructions that go beyond the real
fermionic approach. This generalization is also applied to the asymmetric
orbifold rules recently introduced. These non-abelian orbifold rules are quite
easy to use. Examples are given to illustrate their applications.Comment: 30 pages, Revtex 3.
Comment on the Generation Number in Orbifold Compactifications
There has been some confusion concerning the number of -forms in
orbifold compactifications of the heterotic string in numerous publications. In
this note we point out the relevance of the underlying torus lattice on this
number. We answer the question when different lattices mimic the same physics
and when this is not the case. As a byproduct we classify all symmetric
-orbifolds with world sheet supersymmetry obtaining also some new
ones.Comment: 28 pages, 9 figures not included, available in postscript at reques
Kaluza-Klein States versus Winding States: Can Both Be Above the String Scale?
When closed strings propagate in extra compactified dimensions, a rich
spectrum of Kaluza-Klein states and winding states emerges. Since the masses of
Kaluza-Klein states and winding states play a reciprocal role, it is often
believed that either the lightest Kaluza-Klein states or the lightest winding
states must be at or below the string scale. In this paper, we demonstrate that
this conclusion is no longer true for compactifications with non-trivial shape
moduli. Specifically, we demonstrate that toroidal compactifications exist for
which all Kaluza-Klein states as well as all winding states are heavier than
the string scale. This observation could have important phenomenological
implications for theories with reduced string scales, suggesting that it is
possible to cross the string scale without detecting any states associated with
spacetime compactification.Comment: 8 pages, LaTeX, no figure
Evidence for Non-perturbative String Symmetries
String theory appears to admit a group of discrete field transformations --
called dualities -- as exact non-perturbative quantum symmetries.
Mathematically, they are rather analogous to the better-known duality
symmetries, which hold perturbatively. In this talk the evidence for
duality is reviewed and some speculations are presented.Comment: Error corrected and reference added; 10 pages, latex, no figures,
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