7,448 research outputs found
The behavior of real exchange rates: the case of Japan
The study examines the convergence rate of mean reversion by contrasting the estimated half-life of real exchange rate (RER). We employ an extensive monthly consumer price index (CPI)-based product price’s panel for Japan (the U.S. as the num´eraire). We find that the disaggregated RERs are persistent due to the cross-sectional dependence problems. By controlling common correlated effects, the estimated half-life for all goods may fall to as low as 2.54 years, below the consensus view of 3 to 5 years summarized by Rogoff (1996). After correcting the small-sample bias, the estimated half-life of deviations from purchasing power parity (PPP) increase by 1.03 year. Our findings also support that the half-life of mean reversion of RER is about 3.55 years for traded goods, about 0.11 year lower than non-traded goods. We also show that traded goods and non-traded goods perform distinct distributions of persistence
Limit of Fractional Power Sobolev Inequalities
We derive the Moser-Trudinger-Onofri inequalities on the 2-sphere and the
4-sphere as the limiting cases of the fractional power Sobolev inequalities on
the same spaces, and justify our approach as the dimensional continuation
argument initiated by Thomas P. Branson.Comment: 17 page
Some higher order isoperimetric inequalities via the method of optimal transport
In this paper, we establish some sharp inequalities between the volume and
the integral of the -th mean curvature for -convex domains in the
Euclidean space. The results generalize the classical Alexandrov-Fenchel
inequalities for convex domains. Our proof utilizes the method of optimal
transportation.Comment: 21 page
Some Progress in Conformal Geometry
This is a survey paper of our current research on the theory of partial
differential equations in conformal geometry. Our intention is to describe some
of our current works in a rather brief and expository fashion. We are not
giving a comprehensive survey on the subject and references cited here are not
intended to be complete. We introduce a bubble tree structure to study the
degeneration of a class of Yamabe metrics on Bach flat manifolds satisfying
some global conformal bounds on compact manifolds of dimension 4. As
applications, we establish a gap theorem, a finiteness theorem for
diffeomorphism type for this class, and diameter bound of the
-metrics in a class of conformal 4-manifolds. For conformally compact
Einstein metrics we introduce an eigenfunction compactification. As a
consequence we obtain some topological constraints in terms of renormalized
volumes.Comment: This is a contribution to the Proceedings of the 2007 Midwest
Geometry Conference in honor of Thomas P. Branson, published in SIGMA
(Symmetry, Integrability and Geometry: Methods and Applications) at
http://www.emis.de/journals/SIGMA
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