Quantum Conserved Charges and S-matrices in N=2 Supersymmetric Sine-Gordon Theory

We study the quantum conserved charges and S-matrices of N=2 supersymmetric sine-Gordon theory in the framework of perturbation theory formulated in N=2 superspace. The quantum affine algebras ${\widehat {sl_{q}(2)}}$ and super topological charges play important roles in determining the N=2 soliton structure and S-matrices of soliton-(anti)soliton as well as soliton-breather scattering.Comment: 22 page

A note on expectational stability under non-zero trend inflation

This study examines the expectational stability of the rational expectations equilibria (REE) under alternative Taylor rules when trend inflation is non-zero. We find that when trend inflation is high, the REE is likely to be expectationally unstable. This result holds true regardless of the nature of the data (such as contemporaneous data, forecast, and lagged data) introduced in the Taylor rule. Our results suggest that a high macroeconomic volatility during the period of high trend inflation can be well explained by introducing the concept of expectational stability.adaptive learning, E-stability, Taylor rule, trend inflation

Expectational stability under non-zero trend inflation

This study examines the expectational stability of the rational expectation equilibria(REE) under Taylor rules when trend inflation is non-zero. We find that whether or not a higher (lower) trend inflation makes the REE more (less) unstable depends largely on the data (such as contemporaneous data, forecasts and lagged data) used in the conduct of monetary policy.adaptive learning, E-stability, Taylor rule, trend inflation