Time-varying coefficient models have been widely used to model changing relationships of economic and financial variables. The existing literature usually specifies the time-varying coefficient vector as a stochastic stationary process, a deterministic function of time, or a unit root process....

This article examines the moderating effect of evaluation mode on consumer responses to variety in product bundles. Study 1 finds that consumer preference for the variety bundle (relative to the non-variety bundle) is higher in the joint evaluation mode than in the separate evaluation mode....

Covalent organic frameworks (COFs) are promising supports for the synthesis of noble metal nanoparticles (NM NPs) with controllable sizes and dispersities. However, it is still challenging to synthesize COFs using green and efficient routes. Herein, COFs (TpMA) were prepared by ball milling,...