As college education has become one of the leading export industries in the U.S., issues related to international students have attracted increasing attention. In this paper, we investigate potential explanations for the recent expansion in enrollments of undergraduate international students,...

Fundamental understanding of ion transport in porous carbon materials with different pore size is of great importance for carbon electrode-based supercapacitors to realize the ability of rapid charge/discharge process and high energy density at wide operating temperatures. Herein, hierarchically...

This paper presents a new approach to constructing multistep combination forecasts in a nonstationary framework with stochastic and deterministic trends. Existing forecast combination approaches in the stationary setup typically target the in-sample asymptotic mean squared error (AMSE) relying...

Mildly explosive autoregressions have been extensively employed in recent theoretical and applied econometric work to model the phenomenon of asset market bubbles. An important issue in this context concerns the construction of confidence intervals for the autoregressive parameter that...