Purpose: The purpose of this paper is to analyze whether China's exports can effectively improve the global competitiveness of other BRICS countries' exports from the perspective of intra-BRICS export trade. Design/methodology/approach: ...

In this paper, we propose a novel method for sparse logistic regression with non-convex regularization Lp (p 1). Based on smooth approximation, we develop several fast algorithms for learning the classifier that is applicable to high dimensional dataset such as gene expression. To the best of...

We theoretically investigate the thermopower of silicene systems in an external electric field perpendicular to the silicene sheet. In the absence of the field, we estimate that the thermopower of pure silicene is of order ∼80 μV/K. When a finite field is applied, a comparatively big band gap...

We consider energy (heat) transport in quantum systems, and establish a relationship between energy spread and energy current-current correlation function within linear response theory. The energy current-current correlation is related to thermal conductivity by the Green-Kubo formula, and thus...

In this paper, given recent theoretical developments that inflation can exhibit long memory properties due to the output growth process, we propose a new class of bivariate processes to simultaneously investigate the dual long memory properties in the mean and the conditional variance of...

We examine how directors with investment banking experience affect a firm's acquisition behavior. We find that the presence of investment banker directors is associated with a higher probability of subsequent acquisitions, and such positive relation is not driven by reverse causality. Focusing...