7,540 research outputs found
Modeling Bond yields in finance and macroeconomics
From a macroeconomic perspective, the short-term interest rate is a policy instrument under the direct control of the central bank. From a finance perspective, long rates are risk-adjusted averages of expected future short rates. Thus, as illustrated by much recent research, a joint macro-finance modeling strategy will provide the most comprehensive understanding of the term structure of interest rates. We discuss various questions that arise in this research, and we also present a new examination of the relationship between two prominent dynamic, latent factor models in this literature: the Nelson-Siegel and affine no-arbitrage term structure models. JEL Klassifikation: G1, E4, E5
Implementation of Cavity Squeezing of a Collective Atomic Spin
We squeeze unconditionally the collective spin of a dilute ensemble of
laser-cooled rubidium-87 atoms using their interaction with a driven optical
resonator. The shape and size of the resulting spin uncertainty region are well
described by a simple analytical model [M.H.S., I.D.L., V.V., arXiv:0911.3936]
through two orders of magnitude in the effective interaction strength, without
free parameters. We deterministically generate states with up to 5.6(6) dB of
metrologically relevant spin squeezing on the canonical rubidium-87 hyperfine
clock transition.Comment: 4 pages, 2 figures. To be published in Phys. Rev. Lett. Some
additional details and clarified wording in response to referee comments.
Figures and results unchange
Outcomes in liver transplantation: does sex matter?
A growing literature has highlighted important differences in transplant-related outcomes between men and women. In the United States there are fewer women than men on the liver transplant waitlist and women are two times less likely to receive a deceased or living-related liver transplant. Sex-based differences exist not only in waitlist but also in post-transplant outcomes, particularly in some specific liver diseases, such as hepatitis C. In the era of individualized medicine, recognition of these differences in the approach to pre and post-liver transplant care may impact short and long-term outcomes
Squeezing the Collective Spin of a Dilute Atomic Ensemble by Cavity Feedback
We propose and analyze a simple method to squeeze dynamically and
unconditionally the collective spin of a dilute atomic ensemble by interaction
with a driven mode of an optical resonator, as recently demonstrated [I. D. L.,
M. H. S., and V. V., Phys. Rev. Lett. 104, 073602 (2010)]. We show that
substantial squeezing can be achieved in the regime of strong collective
ensemble-resonator coupling. The squeezing is ultimately limited either by
photon emission into free space or by the curvature of the Bloch sphere. We
derive both limits and show where each prevails.Comment: 4 pages, 2 figures. Minor revision. To appear in Phys. Rev.
Modeling Bond Yields in Finance and Macroeconomics
From a macroeconomic perspective, the short-term interest rate is a policy instrument under the direct control of the central bank. From a finance perspective, long rates are risk-adjusted averages of expected future short rates. Thus, as illustrated by much recent research, a joint macro-finance modeling strategy will provide the most comprehensive understanding of the term structure of interest rates. We discuss various questions that arise in this research, and we also present a new examination of the relationship between two prominent dynamic, latent factor models in this literature: the Nelson-Siegel and affine no-arbitrage term structure models.term structure, yield curve, Nelson-Siegel model, affine equilibrium model
Modeling Bond Yields in Finance and Macroeconomics
From a macroeconomic perspective, the short-term interest rate is a policy instrument under the direct control of the central bank. From a finance perspective, long rates are risk-adjusted averages of expected future short rates. Thus, as illustrated by much recent research, a joint macro-finance modeling strategy will provide the most comprehensive understanding of the term structure of interest rates. We discuss various questions that arise in this research, and we also present a new examination of the relationship between two prominent dynamic, latent factor models in this literature: the Nelson-Siegel and affine no-arbitrage term structure models.Term structure, yield curve, Nelson-Siegel model, affine equilibrium model
- …